I agree that a website is primarily a communication tool. I've sold a bunch through my site, but only to people who had seen it in person. (At least I can't recall ever selling to someone who hadn't seen it hanging somewhere...) Sometimes it's months later, but the site gave them a way to find me. It also gave them an image to mull over, before purchasing.
tha'ts a good point. don't expect anybody to find you on the internet ublessthey knew you already, but once they know you and cannot find you via google you don't seem to exist.