So check this out:
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=7220961733

Looks like a standard PVC self-bailer with decent valves for an unbelievably cheap price. Can't find any info on the company at all. Just wondering if anyone had purchased one of these and had any thoughts about the quality. Granted, they inevitably have lesser customer service than the big names, but for infrequent recreational use, I imagine they would last at least 5 years.  
I know PVC is "less durable" than hypalon, but I've had my Aire cat tubes for 10 years and they've held up great.