Through 5/22, Groupon offers a 7-night resort stay from World Resorts International for $399. That's $1,101 off and the best deal we've ever seen from them. You'll receive a voucher within a week, redeemable for a 7-night stay (or less, should you choose) at over 500 World Resort International locations across the United States, Canada, and Mexico. The voucher is good for one year from the date of purchase. Additional fees or taxes may apply.