Amber thoughts on places to find frames:
Other rooms of your home,
Someone else’s home (if they are changing out their decor, that is; I don’t recommend just taking their mess off the walls. Swap meet, anyone?),
Goodwill,
Salvation Army,
Crappy Junk/Antique Stores (seriously, just keep checking the um, less fabulous ones because they will be cheaper there!),
eBay,
CraigsList, etc.
Yard Sales
Craft Stores (when they go on sale and when you have a coupon!)
For tips on hanging frames check out Classicly Amber