Ignore the whole pari trek thing. Look for a pari proneb ultra 2. I got mine on ebay for under 60 bucks. Then you go to radio shack and spend 10 bucks on an adapter that lets you connect your power cord to your car so you can do nebs while you drive around. Looking back, who really needs the ability to do their nebs with absolutely no power source near like the pari trek gives? Unless you are going deep woods camping (and that would only be like one 10 hour period cause you cant recharge your battery), who cares? The only benefit you can get from a pari trek is that there is a battery pack, that i'm sure after an hour or so of nebs, the life goes down to near nothing. So It's technically an emergency useage battery. In my opinion, you are 10,000% better getting a very nice compressor and then spending 10 bucks on an adapter to suit your needs for a car power source. My pari trek is still sitting here broken, and I paid a boatload for the compressor. I basically spent 100 bucks for sterile brand new parts that are MSRP $ for atleast 200 bucks. To me, ebay is the way to go.