Look on the bottom of the stand to verify that it's an A1316
Looks like China is clearing this inventory out at cheap prices. Here's a brand new one at a great price.
250W Power Supply 614-0487 PA-3251-3A For iMac 27" A1316 LED Cinema Display
http://www.ebay.com/itm/New-250W-Power-Supply-614-0487-PA-3251-3A-For-iMac-27-A1316-LED-Cinema-Display-/162595490404?hash=item25db724a64:g:ttMAAOSw42dZCD3n
At that price, I'm getting one for stock.
[image|1169018]