$60 - Wire Chair

I've said it once and I'll say it again - there is nothing wrong with knock-offs. This chair may not be Bertoia, but it would still get the job done...and for a lot cheaper at that (unless I'm missing something, I'd try to talk the price down just a bit).

http://washingtondc.craigslist.org/mld/fuo/2850354997.html