I accidently bought the sidearm while browsing the vanguard items. (my friend went to talk to me while I was holding the controller and while saying "yes" to him I accidentally pressed the A button) By that time I was actually trying to figure out how to deal with my 200 legendary marks and was choosing between 1000 yard stare and the pulse rifle whose name I don't quite remember. The sidearm is not what I want, so is there anyway I can return it and get my legendary marks back?