They are a little more expensive than some of their competitors, but not a lot at $239 with free delivery, just under $2 per watt with a cheapo regulator. In this price range they are mostly of similar quality with cheap regulator thin cables and usually work OK. They tend to overstate watts, but not by much. Generally good value.
A quick eBay search bought up these at $210 with free delivery, they look very similar.
http://www.ebay.com/itm/120-W-Foldi...22?pt=LH_DefaultDomain_15&hash=item1e9920215e
I would check sellers feedback and get at least 120W folding and maybe go a bit higher at 160W or 180W. Higher wattage than that they get a bit overpriced, but this depends on your needs also check dimensions when folded for storage in your van.
A good mod would be to beef up cables and have regulator closer to your battery or even consider a better regulator, but as you said a basic cheap back up solar set up is what you would get. Hope this helps.
Regards
Terry