I would think that being one of a select few to bid exactly right on a showcase and have my face all over the internet and TV show circuit would be bonus enough.
I think that at this point TV Lubber is going to stick to his/her guns, so there's more point in trying to convince them.
Him. And another thing: That "bonus enough" is nothing. A big cash bonus should be in order for future perfect bidders in the Showcase would make a great bonus. Or maybe another new car.