I'm thinking about buying a used PR3 head. This guy says its been used 1 summer so all the fittings and what-not are good to go. My question is, is there any way to test for cracks? I'm always iffy about buying used parts but hes willing to give me a good deal. So what do you guys recommend I do?
And how much do you think its worth?

Setup includes 2000 B16A2 cams, stock PR3 valvetrain, B16A2 IM.

thanks!