The Netgear WNDA4100 adapter got was refurbished although I quickly found out I can't tax the adapter as a regular adapter and the warranty on them is severely limited so word to those looking for refurbished goods, if they break, you're not going see much warranty/RMA going through.
How much are you buying it for after a 50% off? You can find GTX750Ti's on Ebay for less than 80USD.