This is more up my alley, but again, I'm not much of a pictures man. I'm much better equipped when it comes to doujinshi, manga, magazines, etc. Nonetheless, here is a sample of my collection. Part of it is from one of two Paizuri directories on my machine, theother is from one of two Kyonyuu directories. I also have Sakunyuu directories (lactation), Kyonyuu ni Naru directories (breast expansion), etc., but since those are more fringe than norm I figured it'd be best to try and only share a sample of "commonly-accepted stuff."
The sample picture is inside one of the two rars (oppai1.rar, I believe) so you don't need to download it separately if you plan on getting the rars.
Disclaimer: veterans will probably find little of benefit in these rars. Beginners might find some new artists they wish to investigate further. Ask if you have questions as I may be able to answer some of them. If you don't get a response after a few days, try a PM.