I've noticed that the Phantasy Star "Sound Collection" albums, which used to be quite expensive ($100+), now can be had for next to nothing. Here is a link to YJA past sales, where a copy of Sound Collection I sold for 1200 yen today:
Anyone know why this old and well-regarded album has seen such a price slide? Maybe a ton of copies were printed?
Relatedly: what are some other albums that have seen similar price slides, and are now very affordable?