4x4 or 2wd? Loader or no? Pics and more information will help. TC30 is a great tractor. I had one as my first tractor and it was a faithful servant.
You'll get more money selling outright. Typically you could sell for at least a grand more than your trade offer in one day with a craigslist ad. Quick sale, a few more bucks, minimum hassle. Some people aren't into that and I understand.