The Alan Parsons Project - I Robot (Limited edition, 1983)
If you find this album in the basement, I'd be willing to bet your parents have another, even more valuable stash hidden somewhere nearby.
Bruce Springsteen - The Rising (First pressing, 2002)
It's a Springsteen album that's not old enough for a reissue yet, which means two things: vinyl copies are valuable, and fans still try to convince themselves they loved it.
The Smashing Pumpkins - Mellon Collie and the Infinite Sadness (Limited edition, 1996)
Why are people spending this kind of money on the original vinyl copies? Because they have two extra tracks. That's it, that's the only reason.
Zappa - The Old Masters, Box Two (Boxed set, 1986)
Honestly, what wouldn't you pay for a boxed set containing classics like "The Voice of Cheese," "Willie the Pimp," and "Prelude to the Afternoon of a Sexually Aroused Gas Mask"?