Daddyg,
I have no idea what they are worth. Some parts are kinda grungy others quite nice actually. The important part to me is that they are all the same engine. All the holes machined for the cam, rockers, crankshaft, gearbox shafts, starters, shifter and any I forgot are on center. There are horror stories about rebuilt rocker boxes that, after all the work is done will not fit on the heads because the camshaft holes don't line up. Well, these line up.
I am beginning to have second thoughts about the clutch cover because the oil pump is an integral part of the casting and unles someone comes with a way to recondition them, this one is so nice I may just use it myself.
I get the idea you are more interested in the outside condition, and I am more interested in the inside condition. My feeling is that if the inside is good you can always paint it or something.