I don't see what all the fuss is about, they're just basic GT's with some special paint and bolt ons. It's not a real shelby, Unless Shelby's going through the trouble of actually calling these "Shelby GT350s" with proper Shelby vins. If that is the case then that's pretty lame if you ask me.
I wouldn't go out of my way to rent one, and hertz is gonna want some serious $$$ since they are not normal rental cars. My guess is that when they are sold off they will sell for close if not more than what a new GT goes for just because of all the hype.