Not sure where you are in PA but try a big box office supply store like Staples, Office Depot or OfficeMax since they will have many chairs on display at a reasonable price. I would look for a privately owned store as well where you can get professional help. They will have someone who understands the ergonomics and can get you the right chair for your needs. You may not get that at a big box store.
Back in the late 90s, i suffered through carpal tunnel (felt like I had a broken wrist) because i wasn't properly fitted at my desk. They sent someone to my office to measure my desk height, chair and computer monitor height. I got a new chair (sat higher), adjustable keyboard and monitor. Once we had everything in alignment, carpal tunnel went away along with the stiffness in my neck.
Good luck