It seems like one seller is dumping a kit (I assume it's the same one as the one at K-Mart) for $70, buy it now for $70 on eBay with most auctions ending with the buy it now option. Polaroid is, and probably has had this on clearance for a little while... or that seller got a huge deal someplace. But in either case, I'd guess $90 is a little higher than market.
Sorry, I don't know about the camera quality.