That was because to read them you had to level up first, and even then you needed a high enough INT.1e dmg. Which I had to take back. Because it was printed with half the pages blank.
It was 1983 and I was 13. I went to the local game store The Last Grenadier in Burbank, CA and bought the 1e MM, PHB and DMG.Though I had played for a couple of years I was very poor and couldn't afford to buy any RPG stuff. ( I did create some of my own games and even made some cardboard d8's!)
Then in 1982 I had some birthday money and went to the local gamestore to buy something.
I purchased Starstone by Northern Sages. Can't remember why. Luckily it was great and has become a classic and I now have multiple copies and have run it many times under several systems.
How about you?