Lot of 88 Popular Mechanics magazines from the 60's through the 90's. Old ones were my dad's, newer ones are mine.  Dates are Jun, Oct, Nov, and Dec of 1965.  Jan, Feb, Mar, Apr, May, July, Aug, Sept, and Oct of 1966.  Jan and March of 1967.  Aug 1974.  July and Aug 1976.  Feb 1977.  Nov and Dec 1985.  All of 1986, 1987, 1988, 1989, and 1990.  Jan thru Oct of 1991.  Newer ones have been stored in the cardboard and plastic holders.  Older ones have been stacked flat.  Older ones probably have more spine damage, tears, folds, yellowing, brittle pages, and other flaws.  Look closely at the photos.  Pick up in Plano, Texas.