Everyone on craigslist thinks their pile of shit is a pile of gold. You can probably get 3k for your TT. Condition, tires, body/paint, miles, and how much you value compared to how much they want, it determine what you'll get for it. Also, look/post it on triumphrat, britrider and sites like that. People are sometimes willing to travel a bit to get the rarer bikes... I was.