Groupon offers a Custom Message Delivered on a Large Potato from Anonymous Potato for $6.50. Coupon code "SALE3" cuts that to $5.20. (After purchasing the voucher from Groupon, you'll be able to customize your potato at Anonymous Potato.) With $4.38 for shipping from Anonymous Potato, that's a buck under our mention from two weeks ago, an $8 savings, and the best deal we could find for any custom potato service. Anonymous Potato anonymously delivers a potato with a custom message (up to 140 characters) to the address of your choice. The voucher is valid for 90 days from purchase date. Deal ends February 24.