See sig, David Lace has a content blowout sale, sets for $3.50-16 and you can buy individual images also for less than $1 while matriccontent changes $10 per pic. And you get a free set with your purchase.
That's David Lace content but he has all types and niches and models of course including amateur.
http://www.stocking-hotties.com/12/12.html
http://www.dreamdesigns4u.com/bikerad.html front page