Buy it and if you change your mind or find another, return it. One of the best chairs I ever had came off of Craig's List. The chair was one of those ergonomic delights that a rich man couldn't afford. $100 later and it was mine. He had moved on to another "kind" of a chair.
Tip!
Well I'm known for being slow to pull the trigger. Also there was a $350 chair that I just sort of fell in love with there. It is more expensive, and way more than I wanted to spend, but I really want to find a way to get it.
Coupons?
Additionally I found a chair that we had in the back room. It kind of looks like crap because it's made for a tiny person, but I adjusted it and found out that a larger person like myself can actually fit in it. Also, it had a ton of little adjustment knobs and levers on it which is strange, because you don't often find that many adjustments on a cheap chair.....so I looked at the brand and found that it's not actually a cheap chair even though it looks cheap. I think I'm going to try using it for a while even though it's just a mid back nylon chair.
And in the meantime, stack some cash for that $350 chair. :)