Zazzle and get $8.80 off every sheet. This makes a sheet of 20 stamps cost $9.15. Use the code ZPOSTAGESALE to get this deal! Order 2 or more sheets and get a discount per sheet. This deal gets even better though! Sign up for Zazzle’s FREE Shipping program trial (you can cancel the program right after you order or enjoy FREE shipping 30 days and then cancel). You can even shop through ShopAtHome and get 11% cash back! If you take advantage of all of those options you only pay .43 per stamp! That's cheaper than the post office!