How to Choose a Walker â Buyerâs Guide â justWalkers.com. OUR BLOGGERS. Bryan Mercer is our specialist at Just Walkers. Heâs been a pharmacist since 1979. Heâs here to share information and give tips on how rollators, wheelchairs and walkers can help improve your mobility. Austin Sheeley loves to research mobility products and share how to choose the best items to help you stay active and healthy.