Things from Another World have been running a San Diego Comic Con Sale all weekend that ends today. They have a ton of comics for $1-$2 including Detective Comics #1000 for $2.
You can check out the sale at TFAW.COM. Lots of good comics and cheap omnibus if you do not mind digfing for a deal.
What did I say about TEC1000? Patience is a virtue.. and saves you money! š