Take a look at this auction, it really makes me laugh.

http://cgi.ebay.com/Pre-Rub-Optimus...oryZ4696QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

Looking at the bidding history of this seller, he buys a lot of AFA and MISB transformers, I doubt he doesn’t know he’s selling a G2 Optimus Prime. The only pre-rub accessory on this auction is roller. At least he’s being honest about the fake stickers.

 

only the cab from what i see is g2, the trailer is a g1 trailer, might be knock off, but still not g2 trailer, the g2 trailer was black

 

The pre-rub G1 trailer had metal plates lining the inside of the trailer in place of the inner stickers on the plastic walls. You can tell if it's a pre-rub trailer when there are 4 (or maybe more) square holes on the trailer walls that have tabs on the inside holding the plates in place.

Weapons to go along with Pre-Rub Prime are also different the standard G1 prime - the missiles are silver (like roller), and all the other accessories are bloated with poorer details.

I wouldn't be surprised if the hose is a hollow GI Joe one either, not that that (purposeful?) mistake has ever happened before.