@(you need an account to see links) You could sell it if you wanted to, or if you wanted some tips on how to start trading, there's a really great comprehensive guide (you need an account to see links)
If you have a list of items and you'd like some help figuring out if any of them are worth much, feel free to let me know! I'd be happy to help you out. Lots of NC wearables are always buyable in the NC mall, so people get a lot of those items and they become pretty worthless, or less popular NC wearables are harder to trade, haha, but sometimes you find some real gems on bought accounts.
