After reading the comments on here I was somewhat skeptical as to whether the cable was authentic. However, I contacted the seller and he assured me it was. So, seeing as how I already have a cable prep tool that works with this type of cable, I took a chance and bought 70' of the eBay stuff from the eBay seller at the link above. Even saved a few $$ by making him an offer. Got the cable today, shipped by Fedex in a well-packed box.
I'm sure some will be disappointed to find out that the cable is, in fact, 100% real as advertised. The cable I received is a 70' cut-off piece of new Andrew FXL-540, HELIAX® Flexible Coaxial Cable, smoothwall aluminum, 1/2 in, black non-halogenated, fire retardant, low smoke, riser-rated polyolefin jacketed 50-ohm coaxial cable that was made in the USA by CommScope. It's the exact cable that's listed on the CommScope (the owner of Andrew Corp.) website:
FXL-540-NHR
The cable is even National Electric Code rated CATVR (CATV Riser.)
For those who still doubt the legitimacy of the cable, here's a pic of the coil I bought.
(BTW, I have absolutely no relationship with the eBay seller other than I bought a roll of this cable and am happy with it.)
-Jack
PS: I also found new-in-box CommScope/Andrew OEM connectors (EZ-Fit type N female model 540EZNF Version 2) for the cable for $8 each plus shipping. It's all out there if you look diligently.