My brother listed a Renault R5 on Ebay recently, and included "not WRX, EVO" in the description. He simply wanted to get more views to his auction.
Ebay pulled his ad, saying it was "description spam" or something like that, and he had to relist it.
I kinda see their point, but the "NOT..." thing is awfully common on Ebay.
You can put a fake Carrera RS on Ebay, and they'll leave that alone...just make sure you don't use NOT in the description.