Groupon: Get $40 To Spend At MLB.com/shop For Just $20 -Valid at MLB.com/shop -Expires Mar 31, 2013 -Limit 1 per person. -May buy up to 3 more as gift(s). -$40 minimum purchase, valid for one use only. -If voucher not redeemed by 03/31/13, Groupon will refund amount paid to purchaser in original form of payment.