I have a one sheet wire print out of the Vehicross. It was pulled from the DEI wiring database (accessible only to DEI authorized installers). It should make installationg a little easier. I'll scan that tomorrow and send it on to you if you wish.

I don't know about buying stuff off of eBay, it's always a tremendous risk... no matter what you are buying. With alarms, one thing is for sure, forget about having any sort of warranty coverage by Compustar if your unit ever goes bad or turns out to be DOA. $250 for the spread spectrum is a great deal. I paid that much for the FM unit through connections I have with a local installer. Haven't had the time to install it yet. By installing it yourself, you save at least $600 on labor alone.

By the way, I don't believe the Compustar units ship with installation instructions. They don't want people to install their products on their own. I may be able to get a set of instructions for you through my connection (difficult guy to get a hold of), but no promises... and it might take time and will probably cost you.