C'mon Moon. This isn't about one start. It's about his history. His career ERA is 3.20 and his playoff ERA is just over 5.00 in ten games. Even if you want to call ten games over his career a small sample size it can't be just dismissed offhand because every sample size means something if it's the only one you've got.
The fact is that if you send him out there to pitch in a playoff game you're hoping that that day's results will be an outlier.
I actually like having Price on the team. As I've said, he'll get you to the playoffs and in order to win it you first have to get there. Given that I'm undecided if his salary is too high. However, he would be my fourth choice to start a playoff game, which means the only start he gets is in an emergency situation.