It is ok to sell Tron, however you might receive nasty pm's from the Apron of Destiny. If you don't miss it then it was a good decision. At least you had the chance to own it and play it to your hearts content. Thankfully there are a lot of pins available so there is absolutely no reason for one to simply take up space. Move it on and let someone else enjoy it and replace it with something that you can really groove to.
Tron clicked with me like no other pin has. Bolted. Last to leave and after me.