This is the big clearing-house site for businesses for sale (it includes offline and online businesses): http://www.bizbuysell.com/ http://www.bizbuysell.com/

This is the big clearing-house site for businesses for sale (it includes offline and online businesses): http://www.bizbuysell.com/ http://www.bizbuysell.com/ I haven't used it personally, but a friend of mine is always raving about it for idea generation and small biz opportunities.