All of them!
I've got a copy of Ina-Gadda-Davida still sealed in the original cellophane.
I've got a few hundred albums, mostly 60's and '70s rock. The majority of them have only been played once. I made it a habit to record my new albums directly to cassette, and then store them away.
A few I can remember off-hand:
Sgt. Pepper
The White Album
Eat a Peach
Pet Sounds
Leo Sayer (the wife's)
Frampton Comes Alive
Everything Steely Dan ever recorded.