Kewl Go Kart barn find what's it worth

I was scratchin fleas and just mindin my business and this just caught my eye and after talking to the owner I ended up being the new owner,it's condition speaks for itself and yes it runs and I was impressed by the tears it brought to my eyes when testing it,I still havent topped it out but If anyone knows about this type of cart or some idea what it is worth please let me know,this I don't believe is a cart suitable for some children,it is definately for asphalt only and if ya gotta have it make a reasonable offer.heres what I do know about it....I believe it's built by fox go boy mfg,maybe a flyweight or mak kart,it is a flexible chrome moly frame appears to have very lil' time on it and was made in the 60's from what I can find so far it is a 1963 but I am not sure
1.......fast
2.......looks kewl
3.......new tires
4fairbanks-morse 5"internal expanding brakes
5LeMans magnesium wheels,one has a chip in it
6seat is made by satellite
7staineless steel hardware thruout
8if it could be chromed.....it got chromed