Procharger P-1sc has had some bad leaky issues, which I'm sure you know. I wouldn't buy one used on ebay.
IF you did, I would seriosuly spend another 300 or whatever be the cost and send it back to Procharger and have them replace all seals and such.
This is one of the greatest combo kits I've ever seen. I'm pretty sure you can get it without the Xcal2 which I would do and have it custom tuned by my tuner.
http://www.jmschip.com/shop/product_...roducts_id=340
the link isnt working right now, but it always has before.