I'm ecstatic! I can't believe my luck! Like the title, just bought myself a Sigma 10-20mm off Craigslist a few days ago for only $250! It is in mint condition too.
Now, I have all the lenses I need (i know what you guys are going to say..."you are never finished" :P But honestly, I think I'm set. I don't do wild life, mostly of landscapes, architecture, and people.
Here's what I got:
Canon 40D
Canon 17-55mm F2.8 IS
Canon 70-200mm F4 L
Tamron 90mm SP F2.8 Macro
Sigma 10-20mm