The Koster Team

The Koster Team

The Koster Team

Phone: M: 918-914-3444 918-914-3444 mobile
Phone: O: 918-766-0001 918-766-0001 office
Office: Keller Williams Realty
1740 SE Washington Blvd
Bartlesville, OK 74006

Shelley Koster

Broker/Owner, REALTOR
Cell: 918-914-3444

Shelley Koster is a native of Bartlesville, Oklahoma and has been in the real estate industry for over ten years. As the leader of the The Koster Team-Keller Williams she makes it her mission to find the best home for your family. She takes great pride in her own family, especially her two grandbabies, Dawsyn and Keaton. Shelley, enjoys going to the beautiful lakes surrounding Washington County and the variety of different shops that the city has to offer. Her goals are to provide her clients with exceptional customer care by utilizing the latest technologies, market research, and business strategies to go beyond your expectations. Shelley listens to her clients and finds them the best solutions tailored to their situation.  She has found her home in Bartlesville and passionately seeks to help her clients do the same. (Pictured Above)


Amber Collins

Cell: 918-766-1894

Amber Collins is another Bartlesville, Oklahoma native. She has worked with The Koster Team-Keller Williams since 2012. Her past experiences working on abstracting and title insurance are what led her to the real estate industry. Her role on the Koster Team as the Buyer Specialist is being there with our clients through the home showing and buying process.   Amber is a go-getter and loves the challenge that the real estate industry has to offer. She is dedicated to helping her clients have the best possible experience when buying a home. In her free time she enjoys spending time with her incredible son, Triston, or working on her latest furniture refinishing project. Amber has the passion and skills to help your home buying experience with The Koster Team an exceptional one.


Tiffany Vandagriff

Cell: 918-338-9345

Tiffany Vandagriff has been apart of The Koster Team-Keller Williams since 2013. She has lived in Bartlesville, Oklahoma since 2008 and works to aid the team with keeping everything pristine and organized. She offers our clients extraordinary service with their home buying or selling needs.  However, when Tiffiany is not at the office she enjoys spending time at the lake with her husband, Steven, and her two amazing boys, Bentley and Ashton.  She has found a home in Bartlesville and committed to The Koster Team and helping our clients find their home.  


Lori Masters-Estes

Cell: 918-214-1656

Lori Masters has been with The Koster Team-Keller Williams since 2013. She has a background of seven years working in personal property insurance. She now works to keep clients up-to-date on the latest developments of their home buying or selling process and she also assists with the home closing process. Lori has four beautiful children, Sammantha, Dayton, Zaiden, and Liam and loves spending time at their sporting events. She devotes herself to helping the team by keeping our clients up-to-date and all of the aspects buying and selling process.