I want to buy about 2000 dollar worth of ralph lauren gift card for about 20 percent off. I have about 900 dollars worth of neiman marcus gift card, which can be used in nm, bergdorf goodman, cusp, last call, horchow.. I can trade the nm card for rl card and pay the rest. Or I can also just buy the rl card. Also, I can just sell the nm card for 820. thank you.