How valuable are US90 balloon tires?

[stevensj13]

I have an old 6 wheeler with 6 US90 Balloon tires. Sadly 4 of them are sliced up bad but 2 are in good shape and hold air. since only 2 are good I am going to be converting the 6 wheeler to new style tires and rims but I don't want the two tires going to waste, so anyone know how much these things are worth? To my knowledge they haven't been made since 1978.

[motoman1012002]

nos ones go high and i mean high but used ones and there differnt on the 6 wheels kinda of the same pattern but not they go for a couple hundred

[stevensj13]

The 6 wheeler is an Allis Chalmers Terra Tiger from 1968 and they are legit the same exact tires.