/cgl/ - Cosplay & EGL

I don't have pics at the moment, but a general question about damaged lolita items. I have this JSK in the exact colorway and cut. I paid about $120 for it two years ago and I've only worn it once myself, but it's been damaged since then; button has come off the strap, elastic has been taken out of some of the shirring.
I was thinking I could try and get at least half back from some eager noob who wants their first brand piece, but then again, I just want it out of my closet.
So how do you guys price damaged brand? And if it's only altered, how do you price it then? Full price you paid or some percentage off?