I have a task chair that I bought about 3 years ago - for around $200. It's the kind with the black mesh back on it, and a bunch of knobs and levers underneath so you can really adjust it in all sorts of ways that you normally cannot do with a typical office chair. I specifically got this chair because of that, since most of the other office chairs I bought were always uncomfortable in some way - either leaning too much forward, or too much backward, or the arm rests weren't the right height, etc... The chair has definitely served me well, but in the past year, the wheels started to break on it - causing the chair to lean to one side or another. Also, the piston in it which raises and lowers the chair started leaking, so the chair kept dropping. Not wanting to junk the chair and have to fork out yet another $200 I decided to repair it instead. The piston was a relatively easy, if not very pretty, fix with a piece of PVC piping and some radiator clamps. Essentially you just cut a piece of PVC pipe to the height of the piston bar underneath your chair. Then cut through the pipe on one side length-wise, so you can pry the pipe open a bit and place it around the piston. Then you merely take some metal radiator clamps and tighten them around the PVC pipe. Granted the chair loses it's ability to go up and down now, but at least it won't keep dropping to the floor. If you're really concerned about it's appearance, you could also spray paint the pipe and clips black, so it's really not even that noticeable. For the wheels, it never dawned on me until recently, that you can find replacements online rather cheap. I had been duct taping them back together but that was only a temporary fix as the tape would stretch and break over time. Some stores like Office Max do sell a 5 piece wheel kit, but it's expensive at $35. Instead, I would suggest looking online, as I was able to pick up a set for only $4 plus shipping! Now my chair is back in working order, and it cost me under $10 to fix everything.