Alesis DM4 Electronic Drum Set - Anyone?

Seeing as today must be my off today, I can't seem to find any answers. Does anyone know anything about the Alesis DM4 drum set? My friend is offering to buy his LIKE NEW set for $300. I think that's an amazing deal considering I see used ones on eBay for $450-$700. So anyone? It has 5-6 pads the trigger module, all the wires and everything in great condition! Any help would be much appreciated.

As far as I know, the D4 is the module. The DM5 is the full kit. What do you want to know?

I meant the DM4, and its the full set, what I wanted to know was, is it worth it? Not just for the quality of playing but for resale value?