I'm looking for a simple mattress sham but don't want to spend a lot of money. While looking at Target I found full size mattress shams for about $30. Eek! I want to spend a little less for a piece of fabric that has so little purpose in life. Any suggestions of where to look?

Update: Amy informed me I could find mattress shams at Walmart for $10. This fits into my budget a little better. Thank you, Amy.