Ending today, Office Depot offers an Office Depot SurPrize Card worth $10, $20, $50, $100, or $250 with a purchase of $10 or more. (You won't know the value of the reward until April 1.) That's tied with our mention from three weeks ago as the best such offer we've ever seen from Office Depot. Your SurPrize card will be emailed to you 48 to 72 hours after your order has shipped.