I’m all for preserving obsolete media, but I’m having a hard time understanding how an individual cassette tape can be worth $460! That seller may be unrealistic but individual tapes have been sold for $240:
There are a bunch of listings for this tape on eBay so it’s not one-of-a-kind rare. They are mostly being sold from Japan so it must have been a domestic only product. I wonder what the original list price was? And is it really that much better than TDK MA-X which is a bargain at $40 per tape:
I have a box of unopened blank cassettes somewhere that may be funding my kids’ college education.