This place is very hit and miss. Selling can be a nightmare. If you're selling be prepared to WAIT for a long time and don't expect them to take much of your stuff. I tried selling an expensive purse, beautiful expensive designer jeans, Dr Martens, Chuck Taylor Cons and they wouldn't take anything; and what they do take they won't give you much. Would that employee wear those items you're selling? If not, then they likely won't take them. Come back later to a different employee, you might get a different result. I know they do have to be kind of picky about what they accept, but it's just ridiculous sometimes. Buying, I have struck a pretty good deal a couple of times. Though they sometimes do needlessly over price a lot of stuff.
I haven't been there in a while after a bad experience, but judging by the recent reviews maybe things have changed?