The last several years I've been making a little bit of money via PayPal by selling links in a network of link directories. It wasn't a lot, maybe $10-50/week. But it was completely passive, all I had to do was approve links. I'm looking for other ideas for selling things through my web site that will result in a PayPal transaction. I was using PHPLD for this....what other software is out there that supports this kind of passive income potential via PayPal?