Looking at the pictures, I am assuming they are blue
To break a tooth on a freewheel is extremely hard to do, so I would say they have had a hard time at one point in their lives. Either that, or someone has tried to remove it somehow and broken the tooth off.
70's, 80's and 90's Tuffs did not run sealed bearings, so these hubs are from the era you want them. The fact the rear is stilled riveted in also states it is early 80's with a freewheel hub, not coaster.
You can bleach them to remove the ground in dirt and then dye them using rit dye, or dylons if you can find it, and spin them in a frame while holding a stanley blade to the edge to remove any worn on brake pad. There is also a process called aqua blasting you can look into.
Price, well, I would say no more than $100 in the condition they are in. Bear in mind, it will be $75 - $80 to post them. You will also be hit with a customs charge if the seller is not willing to mark the declaration form as 'RETURNED GOODS', with a price of $40.
Hope that helps a little
