Egrd Online via Amazon offers its Egrd RFID Blocking Money Clip / Wallet for $29.99. Coupon code "HVYXSVZN" drops it to $14.99. With free shipping, that's $15 off list and the lowest price we could find. It stores up to nine credit cards. Deal ends May 30.

Update: The price has dropped to $19.99 before coupon, $9.99 after.