They retail for around $215. You'll often find most models will be around the same price when released. Ebay sometimes has a few slightly cheaper at $195 but by the time you pay postage it's close to retail anyway. I prefer to support the local guy and just pay what he's asking. He;s always fair and reasonable and really knows his stuff.
I think all the Sandmans are limited to 2304 units per colour. Hard to say how quickly they'll sell.