Boost gauge was fine, 20in/hg @ idle. Under full boost, with you losing 6-7psi of boost, you're _usually_ going to hear it. Stock boost leak or not.
If there was a boost leak on that car, and you were holding 17psi steady, then boost when the leak was fixed would have been above 17psi.
Generally if there's a boost leak the car will run rich. This car felt like the power just wasn't there. Not like there was a boost leak.
While I know very little about the SRT4, I cannot imagine that a "factory boost leak" would lose 6-7psi of pressure.
Edit: Im not going to buy that car. I was simply taking it for a test drive from a local dealer to show my gf the car, and see how it felt inside and out. Even SHE said she was unimpressed with the power of the car, which is a huge tip off. There was def something wrong with it.