The original Thunder Ranch (aka Tom McBurnie) has built some stellar cars in years past. And then there were those which were not so hot in quality. If you find one these days, say, 6-7 years after McBurnie went on to other things, it either has probably been sorted out and is relatively issue-free or is a build from the guys he sold his business to. Several people on here have TR cars and like them. Several more have TD cars and have had to deal with McBurnie (myself included, and I don't even have one of his cars.....I was trying to help someone else) and he was a sweet-talker on the phone but did nothing to help once he hung up. It was not a bad thing when he left the business.
Maybe the West Coasters know more, but I thought that McBurnie sold out to some other guys a few years back and left the business, although I haven't heard much about TR for a while now.
My opinion on that car is: contact them and negotiate a bit. It's not a bad price for the car and, as you say...... They don't pop up in BC very often.