What are you guys using for reasonably priced 650b wheels?
One cheap source is old bikes that had 650B wheels. The Schwinn Mirada during a couple years of its making had 650B wheels. The first cheap wheelset I bought was probably taken off one of these (Alesa Rims). I actually passed a locked up Schwinn Mirada that had weeks growing through it and eventually stuck a tag on it. /checked the rims and they were 650B (584). The property owner called me, said it was abandoned, could i please come and cut it free and take away. I kept the wheels pitched the bike. They will serve as decent back up rims or maybe I'll sell them who nose. Otherwise custom built 650B's will cost you near 300 bucks with decent hubs. With the rims you could try to do a wheel build.
Soma has two tires that are essentially 650B Paselas one with a stiffer sidewall.
NOt sure if they are the same, but I use the Soma B-Lines 650B and I love them - faster than CDLV and just as durable.