Been through 2 Staples Chairs...now what?

I work from home so am sitting on an office chair a good bit of the day. I have a sit/stand desk so I do take breaks from sitting. Currently dealing with and trying to fix upper back pain/posture issues. I'm 5ft 3in, 126lbs. I do not like mesh seats. I was considering Leap v2. Unfortunately, I cannot make it to any used office chair stores near me (closest is an hour away) as the only free day I have to go is Sunday's and those places are closed on Sundays. If I get something online, it's probably a PITA to return if it doesn't work out I assume? I guess I could try to sell on Marketplace but we all know we never get what we ask regarding price on Marketplace...

There is a used Leap V2 on marketplace near me right now selling for $280. Would that be a fair price for that chair?