Not sure if this is a pricing error or just a really great deal.
This is part of the X85 series, you can find a review of the 55" equivalent here on avforums:
http://www.avforums.com/review/sony-x8505-kd-55-49-65-x8505b...
The panel quality is close to the X90 series, minus the magnetic fluid speakers (which many people don't seem to like)
The cheapest reputable place I could find it on staticice or shopbot that was anywhere close, is Dick Smith selling it for $4499.
This TV is great value for money, because it's currently cheaper than the Samsung (normally cheaper) 65" JBHiFi have.
Would have bought it myself if the missus had of agreed…but I thought the least I could do was post it here.