I recently purchased a bracelet from a duty free shop while I was on vacation. I didn't try the bracelet on until I got home and found it was a little big (turned out to be a gm). I called my local Hermes store and asked if I could exchange it for the pm--they said I could. My question is since the price I paid at the duty free shop is considerably less than the price at my local store, will I have to pay the difference when I do the exchange? TIA