Supercharger under $1000

...or even under $300! What the heck is this? I can't help but be curious. They are on ebay, they are an electric supercharger that is activated only when the accelerator pedal is smashed down to at least 75% See and read here: [ame="http://www.ebay.com/itm/Electric-SUPERCHARGER-KIT-3-PSI-900-Watt-Intake-Turbo-Cold-Air-Dodge-Chrysler/300906979454?_trksid=p2047675.m1850&_trkparms=aid%3D222002%26algo%3DSIC.FIT%26ao%3D1%26asc%3D18058%26meid%3D2897848760634810157%26pid%3D100011%26prg%3D8304%26rk%3D5%26rkt%3D5%26sd%3D260907088230%26"]Electric supercharger Kit 3 PSI 900 Watt Intake Turbo Cold Air Dodge Chrysler | eBay[/ame]

So, if you can gain 3+ psi at 800 cfm, for under $200, wouldn't that be a good thing? Are they total crap? I can't help but think so, but I've never seen or hear of these things. Sure I would rather have a Paxton, but right at $3k+ that's NOT gonna happen. What thinks you, the FABO panel of knowledgeable experts?