[private joker]

I think c/f is right even though it sounds gross. Problem is, despite the fact that he views you as tight, this isn't the type of action you normally put in with a hand that you plan on folding. That means he shouldn't be bluffing very often at all; especially because he's old and good. I would say if he bets the river it's likely he's got you. It IS live, after all...