If I'd only known, I'd have gladly bought you a Supermobile way back when.  Personally I couldn't see it for dirt, but maybe we could've worked out a trade for a Corgi Jr Batmobile or an Ertl USS Enterprise.  
 I got the Daily Planet delivery truck because it was the only vehicle that made any sense.  Although in retrospect it probably wasn't a good thing that the graphics on the side of the truck showed Clark Kent turning into Superman!