Well the 1980 would be about 20k I think maybe a bit more. (Wrong second hand on the 80 with a sterile case back) 82 about the same.
85 possibly 5/7k
The 94 SBS would be pushing 5/7k I would have thought (not many issued that year). So it’s not a million miles out.
Buying the instant collection takes the fun out of the chase though