$600 to $700 each is the going price for a good one in my area (Port Angeles, WA on the North Olympic Peninsula). This size saw was the workhorse of the big tree loggers for years here until surpassed by the newer lighter Stihls. I have one (a 076AV), had two others but gave them to my son in law, he logs in the Coast Range.
Parts for both on ebay.
They should have a rim and drum, if not, buy and install. Run 404x063skip chain, and a 7 tooth rim. Turn the oiler up to high and push that manual oiler often!!! In the winter I thin chain oil 25 percent with kerosene. Grease the roller tip on every tank of fuel.
If you use them for milling be sure to use the optional tank for tip oiling. You want lots and lots of oil on the bar and chain, milling is hard on both.
If I were in the area I would buy both. I like them and the son in law loves them.