I don't know the US market, but my last three chairs were a) second hand from an office, great till it broke, b) $400 "director'¨s chair" from Office world, never very comfortable and broke in less than two years, c) another second hand office chair, still going strong after a year.
Point being that many offices redecorate every 5 years, which may mean a colour change, which may mean new furniture all round. My current one is like a deluxe typists chair, not much to look at but you can pretty much live in it. Brand new it was probably $500+, for me - free!
If I had to go brand new, I'd get this one
http://www.ikea.com/us/en/catalog/products/00070366