$10 bonus at Coinstar when you cash in $40 or more

Dump $40 or more worth of coins into any Coinstar machine, and you'll get a $10 iTunes eCertificate as a bonus. This offer expires Sept. 30, 2010. Coinstar takes a fee equal to almost 10% of the money you cash in, so if you cash in $40 in coins, you come out $6 ahead.

Look for a bonus code on your receipt. Then redeem your code to get a free iTunes eCertificate, which will be mailed to you in 2-3 weeks. You have until Oct. 31, 2010, to redeem the iTunes card.

Caveats: only at participating Coinstar machines. Limit one iTunes gift card per promotional code. Gift cards will not be shipped to PO boxes. Consumers must have a computer and access to the Internet to redeem an iTunes gift card. iTunes gift cards are subject to terms set by the issuer.

You can also get a 20% off coupon at the Gap when you cash in at least $5 worth of coins, but since Gap has been releasing so many coupons, there are better bargains out there.