Summer weekends in the Hamptons, whirlwind trips on their private jet, and plenty of ritzy dinners you can't afford - you probably owe a lot to your richest friend, but they know you can't repay their generosity with money. Gratitude, of course, is free, but you also want to show your appreciation for all that they (and their bottomless bank account) do for you this season. To fit their tastes, a luxe token or chic treat will do just fine. Our trick? Going to the fanciest site and sorting lowest to highest. Or, you know, taking one of our suggestions ahead. (Sure, it's the thought that counts, but no one said the thought can't be tasteful.)

[Photo via @patriciasanes_]