I'd jump on this, if it wasn't the international spec.
The RX100 line is a very well respected line of Sony Compact cameras. With a 1" sensor, it has better low light performance compared to many other compact cameras. There are currently 6 in production models of the RX100 line, from the MK 1 all the way to MK 6. Note the MK 5 was recently re-released as the MK 5A with some minor updates and the original MK 5 is no longer for sale.
Yes, the MK 3 is a bit old. Doesn't have all the fancy features of the newer generation, but still it is a solid camera, especially at this price point.