I would recommend craigslist or ebay. I don't know if she'll think this hypocritical, but she can sell those cards for cash and spend the money wherever she likes. I agree with Prudence that the money has already been paid for the cards, so someone's gotta use them. But if the LW doesn't want to, then she can at least get some cash (even if it's not full value) out of them and buy the clothes her conscience will allow her to.