A buddy of mine is listing his KNC Jupiters on eBay. Since he doesn't have a bitcointalk account, he asked me to mention the auctions on here. All are October batch, have never been overclocked, and always run in a data center. He's got 5 of them up for sale.
http://www.ebay.com/itm/KNC-Jupiter-Bitcoin-Miner-550-GHS-October-batch-kncminer-w-850-w-PSU-in-hand-NR-/251483528557
http://www.ebay.com/itm/KNC-Jupiter-Bitcoin-Miner-550-GHS-October-batch-kncminer-w-850-w-PSU-in-hand-NR-/251483533994
http://www.ebay.com/itm/KNC-Jupiter-Bitcoin-Miner-550-GHS-October-batch-kncminer-w-850-w-PSU-in-hand-NR-/251483539173
http://www.ebay.com/itm/KNC-Jupiter-Bitcoin-Miner-550-GHS-October-batch-kncminer-w-850-w-PSU-in-hand-NR-/251483546542
http://www.ebay.com/itm/KNC-Jupiter-Bitcoin-Miner-550-GHS-October-batch-kncminer-w-850-w-PSU-in-hand-NR-/251483550231