Up for sale is a Yankee Hill Diamond free-float rail. The rail is their "specter length" which is 9.675 inches. It has been installed once and removed, and has a a few slight scratches (pictures shown below)
I paid about $130 for this from Midway (http://www.midwayusa.com/product/2696113029/yankee-hill-machine-diamond-free-float-tube-handguard-quad-rail-ar-15-aluminum-matte), link is to give specifics.
I'm asking $100 OBO for this! Payment by Paypal or USPS MO.