1950 international cub

It's hard to say what your tractor will go for, but as a rule of thumb, a running Cub in good condition with fair to good rubber will bring + or - $2000. If it smokes, blows oil out of the filler cap and/or has low compression - indicating that it will soon need a rebuild - the price will be lower. A crack in the block (apparently common in these tractors, will lower the price as well (some cracks are worse than others. If it shows none of these problems, runs great, and is mostly original, the price will be higher. With impliments you can probably add one to three hundred dollars, depending on their condition and how rare they might be. Generally speaking these little tractors are quite collectable and will bring more than the big H or M models in similar condition. Check a few websites including the photo ads on this site and I think you'll get a better idea of where your tractor will fit in the Cub price range.