Wow, TIL... sealed TDK SA 90's cost $25 each on eBay! Apparently this is due to a shortage of raw materials as well as market size? I wonder if the problem co

Wow, TIL... sealed TDK SA 90's cost $25 each on eBay! Apparently this is due to a shortage of raw materials as well as market size? I wonder if the problem could be solved by using other tape formats that might be more readily available, i.e. record audio to proper "good" tape in some other format and then figure out the rest later.