First off I think the 80 will be popular with shooters of a certain age. During the early 80s the 80 was the gun to aspire to, due in part to the fact that the 80 made power easily, and lets face it we were power mad back then.
The late John Darling shot one, and Venom were doing some wonderful things with them. When the 77 came along it did eclipse it to a degree, but it never really went away.
So in essence I think some well placed nostalgia is at work here, anyone serious about airguns should have at least one 80 (I have two), in the collection.