Steve Vai himself describes it that way, the only RB prototype, in a signed letter from him that accompanies the guitar.
I can read, I can also investigate myself.
Listed as Rootbeer JEM on vai.com
Listed as Rootbeer JEM Prototype
The guitar being sold at Juliens
Is the first guitar listed on vai.com as Rootbeer JEM
My experience only . . .
Shipping and insurance for my guitar was $112 from Beverly Hills to New Hampshire (which I thought was reasonable). They said it would take anywhere from 2-12 weeks (which I didn't really like), but the auction had nearly nine hundred items and many of them were shipped all over the world, so I figured I'd cut them a little slack. I received the guitar 33 days after the end of the auction, very well-packed.
Everybody at Julien's answered my questions via phone and email promptly and politely. They treated me like a high-roller although I clearly wasn't. Overall, I was very satisfied.
I was wrong, I looked it up, My quote from ArtPACK
Processing/Packing/Ground Shipping $225.00
I called them and told them they were crazy, he said he has no idea what I make but he makes $250/hour and wouldn't think of working for any less [the pompous a$$hat]. I talked him into just PACKING the guitar for $100 [ridiculous] and sent him an email UPS label.