741, cone sure sure grip, 3.23, 1970. What is it worth?

Not a for sale post! It may come for sale in near future.

I have a 1970, 741 case third member with 3.23 gears, and cone style sure grip. A section of the gears that was above the oil has some minor rust on it. I spent 10 minutes on that with WD-40 and a Scotch Brite pad, comes off with very little effort. The unit rotates freely, smoothly, and quietly. I have no concern that this isn't a fully usable unit as is.

What would be a realistic value on this?

The rust appears worse in photos than in person.
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