I bought this off ebay from a salvage yard doing business on there. It is suppose to have 20k or less on it, seems it's marked on the tag 17k. I bought this for my 97 Z28, but unfortunately they're pinned differently being an LT1. I bought it because my tach wasn't working correct due to going to the EFI 24x system, but figured out it was in the tuning anyway. Back to the point, I paid $150 for it, but I would sell it for $100 shipped. I use paypal for payment, plus it protects both buyer and seller.