That bike looks to be in excellent condition. I'd definitely encourage you to go check it out. Guys like that jerk exist, unfortunately, but there are just as many encouraging people out there. I'm still a Clydesdale at 275 lbs but I've had skinny racer guys helping me out and encouraging me the whole way through 140 lbs of weight loss. I may even join their race team next summer if I can drop another 50 or so before then.