[Jobu]

I usually try to post scans though I don't think that it takes a Herculean effort to send a message to ask for a scan if I am interested. However, if I am browsing you have little chance of selling me a card without a scan posted.

There is one angle that hasn't been mentioned: there are lots of collectors here who don't post their cards and tend to prefer to keep their stuff private. If one of these selllers thinks that there is a chance his card won't sell he can keep it more or less private by not posting scans.