This is a good deal for this camera, which still lists for $648 at Amazon and Adorama.
The RX100 is a great little 20MP still camera - and a very capable video camera too. Here are a couple of examples from one of our sponsors, Vimeo:
This one was shot 80% with the RX100 and 20% with a Canon 5D and features Ellie Goulding's new track, Burn:
As of this post, 58 had been sold and "more than 10" were available. If you want one at this price, you should jump on this eBay listing now.