Alvin Woon, over at alvinwoon.com, Daily Misery, has a difficult time with people who simply can't believe that a product as good as Firefox could actually be free or that a free product could actually be as good as Firefox.
I've got a suggestion, Alvin, send them to the Firefox Store where they can pay $15 (and not only get Firefox, but a nicely packaged CD and Guidebook -- just like all that other expensive software you buy at a computer store.) That would make them feel better about using Firefox and it would contribute money towards the Mozilla Foundation so we can affort to continue making great products. It's a win-win situation!