Cheap discs (frisbees) @ REI.com

Super Clearance on a couple of discs at REI.com.

$4.83 per disc for certain colors. No shipping if you pick up in store, and local tax does apply.

http://www.rei.com/online/store/ProductDisplay?storeId=8000&catalogId=40000008000&productId=13590626&parent_category_rn=40003670&vcat=REI_SEARCH

Pretty good deal, if you don't mind the colored discs.