I think this came in a set with another Chromed version of this casting originaly. I am sure that this is worth at least $3.50. Man just put it in your basement for 10 years and then it might double in value.....lol
I did some searching on the net and did find reference on Tom's site to him creating the design for the Meat Wagon and Barris using his design, with some minor changes to create a 1:1 version, but called it the Surf Wagon. It is also mentioned on the batman site for the batcycle (George Barris also created the batcycle).