Many years ago I got rid of (can’t remember if I sold them or gave them away) my copies of Challenger, Challenger II, and Challenger 2000, all by Bruce Rea-Taylor, on the grounds that I’d never play them. Last year I saw copies and got all nostalgic, so I bought them 🙂
I didn’t know Zaloga wrote a book called Red Army, are you sure you’re not thinking of the one by Ralph Peters? Amazon have the Ralph Peters one.
I used to have the board wargames Air Force, Dauntless, and the Air Force Expansion Set. Every now and then I kick myself for selling them, even though I’m not sure I’d ever get to play them.