Cockshutt 80 rare enough tractor and add the fact its standard adds to value as lower numbers made. I have chased cockshutt connection for a number of years now and only came up with "educated guess's" no concrete info. An interesting fact is that standards had starters while rowcrops did not,something to do with cultivators interfearing . So 80 rowcrops not as collectable as no-one likes to crank anything.  Add the fact that standards came north or into plains and rare to see a stanard 80 in mid west let alone a cockshutt model Grant