For sale are a total of 81 issues of Astronomy Magazine spanning the years from 1975 to 1992. Here's what I have:
'75 Aug; '77 Nov, Dec; '78 Jan thru June and Sept thru Dec; '82 oct, nov, dec; '83 jan thru oct; 84 all except mar; '85 july, sept thru dec; '86 all except jan, june; '87 full year; '88 all except mar, sept; '89 feb, mar, apr, may, jun; '91 dec; '92 mar
Most are in fair to good condition. I figured $0.80 per issue is fair. That's $64.80, round down to $64 plus shipping (about 40 pounds).