In the last 6 months I have made $120 in store gift cards by moving my Prescription Medication. Almost every week there is a coupon in the Sunday paper for store gift cards if you move your Prescription Medication. It is no big deal and easy to do. It doesn't take extra time. I have moved my Prescription Medication from Kroger, K-Mart, Walgreen's, and Rite- Aid and received a $20 gift card each time.
Also, most pharmacies will match the $4.00 Wal-Mart deal for Prescription Medication but you have to ask for the price match and you have to ask every time you have your Prescription filled.