Generally, the MFT Battlelink stock goes for $100-$120. Amazon has the grey version (complete with buffer tube and hardware!) for 29.99. 8 left after I ordered my two. Get em while they're hot!
http://www.amazon.com/Mission-Tacti...-2&keywords=mission+first+tactical+battlelink
http://www.amazon.com/Mission-Tacti...-2&keywords=mission+first+tactical+battlelink