To begin with: the infamous "Butcher Album" by The Beatles. The original cover for the Beatles' "Yesterday and Today" understandably caused some controversy, thus (after they were recalled) most had a more conventional cover pasted over the original. Estimated to be worth $40,000 for mint first state stereo copies. $150 to $10,000 for other pressings and conditions.
John Lennon and Yoko Ono's 1969 album "Wedding Album" (USA Capital LP Acetate with hand written sleeve notes) Currently on sale at Forever Vinyl for $50,000.