That is outrageous for an office chair that you can sit in first. I found my chair at a used office furniture store. I was able to sit in at least 100 office chairs to try them out and was able to select the one I liked best for $35. Another one I liked was only $5, so I bought it too.
Try to find some place that has a lot of chairs for you to try out. I don't think one should have to spend that much on a chair like that.