As a software engineer, I'm always baffled by this reaction... It's $10, less than what I just paid for lunch. Have we completely lost the value of good software?
We've lost the value of any digital goods. People will balk at paying $.99 for a song they will one forever but won't think 2 seconds about dropping a $1 into the hat of a busker on the subway.
Yes, we've probably lost the value of good software a bit. The bigger issue is that I no longer judge the value of software based purely on a page (or app store description) advertising it. I need to try it out to see its value. So if the company is charging up front for the software, just about any amount seems too much.