I ordered a PSS-610 a few weeks ago. I had trouble finding anywhere that had one in stock, but eventually tracked one down for the bargain price of Â£250.
When it arrived I couldn't believe it - you'd think it would retail for more like Â£25. Another surprise was that it was painted gloss white, not black like in the photos. The part number on the box was PSS-610W, so the 'W' suffix must designate the colour.
The paint wasn't finished all that well - it had a lot of pimples in it and a red mark that wouldn't come off (which was why I sent it back).
If you get one, be careful handling the tubes - I picked one up in it's wrapping, and it slid out onto the floor, making a significant dent in it (the floor).
However, unlike some mounts shown here, it looks quite smart and would look quite acceptable on your living room ceiling - if you don't mind the ludicrous price.