Adidas tennis skirt

this is a very cute Adidas tennis skirt. It's brand new with tags. It's dark grey with pink Adidas symbol. I love it, paid $75 for it not long ago at all. but I can't seem to find anyone who wants to play tennis with me. anyways I'm wanting $50 for it. I paid 75 plus tax literally a month or maybe 2 ago and haven't even got it out of the bag until now. of course I have no idea where the receipt is!