[Current Prices For M-14]

The are also many Smith Ent. Registered receiver guns built up with GI part, that is what I picked up 21 years ago for $1175

 

http://img696.imageshack.us/img696/8792/m14e22.jpg

[How To Tell A USGI Bipod?]

Like TSMGguy said, look for the brazing on the upper end. The feet are also nicely Tig'd onto the legs of an original. If it has not been used much like mine, you can also see the magnafluxing proof marks in green ink. Here are some shots of mine.

 

http://i349.photobucket.com/albums/q386/Millerbuilt_MS/Guns/DSCN0423.jpg

 

http://i349.photobucket.com/albums/q386/Millerbuilt_MS/Guns/DSCN0427.jpg

 

http://i349.photobucket.com/albums/q386/Millerbuilt_MS/Guns/DSCN0424.jpg