So long as the seller hadn't damaged them, i'd have been happy with just the pair of HF diaphragms at a 100 entry fee.

If they could be rebuilt as 605B's, the total cost would be less than half what 40+ year old 605B's typically sell for, and they could be fitted with a modern(improved?) type horn at the time of rebuild.

I would not leave any working pair of Altec duplexes behind when the asking price is gas money or less.

Just my .02......................