This deal has ended.
Through 4/6, Groupon offers a $100 credit at Art.com for $50. That's $50 off and the highest voucher value we've seen from them (usually it is $25 for $50). Art.com specializes in posters, framed art, and more. This voucher can be redeemed though September 30. This credit also includes shipping costs. (Shipping starts at $4.99.) Note that although this is listed under Groupon Minneapolis, it can be purchased and used by anyone online.