Don't know if I can paste the link or not and don't have time to read a bazillion by-laws right now.
If you are looking for the 100mm Canon 2.8 macro lens I know a site where a guy is selling his for $425 (don't know him personally other than he's a member of a different forumn I'm on.

PM me for info unless someone of authority says it's OK to include link on here.