Is this a good deal in Quartzsite?

Better deal, here, at Solar Blvd:200 watt kit

If I was looking for a folding panel setup, I'd buy the individual panels, two hinges, a length of wire, and a cheap controller. The price of DIY for installing two hinges and adding terminals on to the ends of the wire saves a whole lot of money.

Good luck with whatever way you go, solar is the best charging system for RV!