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Mary Slay

Mary Slay
Real Estate Agent
Saint Louis MO

(MO: 2019008842)

REALTOR® 1 Active Listings Serves Saint Louis County, MO
View on Realtor.com

Contact Information

Brokerage
Dielmann Sotheby's International Realty

Office Website
Office Address
8129 Stanford Ave
Saint Louis, MO  63130
(Saint Louis County)
Office Phone
314-725-0009
Office Fax
314-721-5006
Mobile
314-779-8980
Email
msla*@*************.com
Show Email for $5

About Mary Slay

Mary Slay
Over-Delivering on Expectations has been the hallmark of Mary’s Career!

As an account professional and a product manager Mary has a deep background in training management analytics and promotions Her success as a Realtor is built upon an exceptional understanding of trends details and processes that engenders loyalty and confidence with buyers sellers and colleagues alike

Mary is an enthusiastic people person who listens with interest and intensity She has a flair for the esthetic and is always able to perceive both the style possibilities and the fit for customers A workaholic by nature she is creative tireless and thorough but her warm easy smile and sense of humor will rule the day when it comes to working well with others and tackling the details Mary is a super-star realtor!

BACKGROUND:

Associate of Arts Degree from Southwestern Illinois College
Numerous Professional Development Certifications including:
\tStore Operations Training Program
Leadership Toolbox
Analytics Summit

Previous Work Experience:

Saks Fifth Avenue Department Manager
Estee Lauder Account Executive
Estee Lauder Regional Operations Director including Neiman Marcus Foleys and Famous Barr

Mary shares her life with her husband Hank and her adorable son and puppy Mary loves to cook for her large group of family and friends but she also loves dinner out and is always a source for new restaurants and shops around town

When you meet Mary Slay you will be sold!

What My Clients Say
Seller of 25 Trent Drive and purchaser of another home writes…

My wife and I couldn't be happier with our decision to hire Penny and Mary The sale of our Trent Drive home was fast and easy thanks to their large database of contacts and marketing strategy While we certainly appreciated this we are most appreciative for their patience responsiveness and guidance during the search for our next home in a very competitive market After a roller coaster of missing out on several homes we finally found the right one Penny and Mary were just as responsive and patient as they were at the beginning of our search 4/19/22

GH writes
Mary and Penny provided top-notch service and insight from the initial contract offer negotiation and acceptance of the offer through inspections and closing Their guidance and market intelligence in this current competitive and fast-moving home market made purchasing my forever home a reality Their service was seamless and the communication couldn't have been better 4/20/22

Scott & Kelly R write…
We are so grateful to have had Penny and Mary help us find our amazing home They made the process simple from starting to look to closing Both are great with communication answered when called or texted and always had knowledgeable answers When negotiating what was in our best interest was their top priority We would recommend them to anyone 4/20/22

LGS writes…
Mary and Penny could not have been more professional in the selling of one home and purchase of another Their expertise far exceeded any realtor I’ve ever dealt with I truly feel blessed to have the good fortune to have had them represent us The print material and video in the listing were superb Everything was handled to perfection from getting the house ready to showings to the closings Thank you for all your dedication and hard work! 4/25/22

Satisfied Seller writes…
Mary and Penny provided exceptional service to our family that was above and beyond our already high expectations This was our family home for the past forty years and now was owned by the adult siblings Mary & Penny were sensitive to the emotional attachment that all of us had for our home Their extensive knowledge of the market was apparent Their guidance and hard work helped our family achieve the goal that we had asked of them Mary & Penny have our family’s deepest gratitude for their exceptional efforts 4/21/22

Tom Schaefer writes…
I had a very positive experience with Mary and Penny as my buyer's agents They were professional and helpful throughout the entire process of showing closing and everything along the way I highly recommend them 4/20/22

JFD writes…
I had very specific notions about where I wanted to move following my service to the City of Town & County but few definitive ideas about how to make it happen Penny and Mary solved that challenge for me! Not only did they find the perfect home in my ideal location but they helped me present a winning offer in a very competitive and complex market As if that wasn’t enough they marketed and sold my existing home to a strategic buyer allowing me to maximize the return on my investment Penny and Mary are very professional smart and hardworking and I could not be more grateful for their advice and representation 4/20/22

Saint Louis County, MO Real Estate Market Analysis (Single Family Homes)

$396,987
Avg. Listing Price
From Mary's portfolio
3.2 / 2.3
Avg. Beds/Baths
Typical property size
1,944 sf
Avg. Square Footage
Interior living space
3350
Active Listings
Current inventory

Saint Louis County, Missouri represents one of the most dynamic and competitive real estate markets in the Midwest, with 7,497 total actively licensed agents serving a diverse array of communities from bustling suburban developments to historic neighborhoods. This substantial agent population reflects the county's economic vitality and the ongoing demand for both residential and commercial properties across its 508 square miles.

The market's complexity stems from Saint Louis County's unique position as Missouri's most populous county, encompassing everything from luxury estates in Ladue and Town and Country to affordable family homes in Florissant and Hazelwood. With all 7,497 agents maintaining current email addresses, the market demonstrates a high level of digital engagement and professional connectivity that facilitates rapid information flow and transaction coordination.

Major Saint Louis County, Missouri Real Estate Markets

The county's real estate landscape is anchored by several key metropolitan areas, with Clayton serving as the primary business district and attracting significant commercial investment. Suburban powerhouses like Chesterfield, Ballwin, and Kirkwood drive much of the residential activity, while emerging markets in Oakville and Sunset Hills are experiencing notable growth as buyers seek newer construction and modern amenities.

Geographic diversity creates distinct market segments, from the prestigious Central West End adjacent to Forest Park to the family-oriented communities of Crestwood and Webster Groves. The western corridor, including Wildwood and Ellisville, continues to expand with new developments, while established areas like University City and Richmond Heights offer unique urban-suburban hybrid appeal that attracts both young professionals and established families.

Market Dynamics and Geographic Complexity

Saint Louis County's real estate market operates with surprising resilience, benefiting from diverse economic drivers including healthcare, technology, and manufacturing sectors centered around major employers like BJC HealthCare and Express Scripts. The market shows distinct seasonal patterns, with spring and early summer driving peak activity, while the extensive agent network ensures consistent service availability throughout slower periods.

Price variations across the county can be dramatic, with luxury markets in Frontenac and Des Peres commanding premium prices, while areas like Berkeley and Jennings offer significant value opportunities. The Mississippi River influence and proximity to downtown Saint Louis create microclimates of demand, with waterfront and river-view properties in communities like Portage Des Sioux commanding unique market premiums.

Why Businesses Need Saint Louis County, Missouri Agent Contact Data

Financial services companies, mortgage lenders, and insurance providers can leverage the comprehensive email database of 7,497 agents to efficiently reach decision-makers who influence significant transaction volumes throughout the county. Real estate technology companies and service providers find this agent network particularly valuable for launching new products, as Saint Louis County agents typically embrace innovative tools that help them serve diverse client needs across varied price points.

Marketing and advertising agencies benefit from direct access to agents who understand local market nuances in communities ranging from Affton to Ferguson, enabling targeted campaigns that resonate with specific demographic segments. The complete email coverage ensures that outreach efforts can effectively penetrate all market sectors, from luxury specialists to first-time buyer experts, maximizing campaign effectiveness and ROI across this economically significant Missouri market.

Current Property Listings

As of 2/17/2026, Mary Slay has 1 property for sale in Saint Louis and surrounding areas.

$385,000

Listed 2026-01-27

16176 Lea Oak Ct
Chesterfield, MO  63017

Beds: 2.0
Baths: 2.5
Sq Ft: 1,800
Lot: 4,461 sf
Townhomes Map
View Full Details

Current Property Rentals

Mary Slay currently has no rental properties available in Saint Louis and surrounding areas. Check back later.