Amsoft CT-2 floppies are probably the most expensive magnetic media on the planet right now.
€129 + €37 shipping = €166

Formatted for the ZX Spectrum +3 at 180k per side, thus, ten sides = 1800k
1800k / 166 = €10.84 per kbyte.

Compare to a current Sandisk 1Tb external drive for about $160 today.

#retrocomputing #cf2 #amsoft #floppy #discs #floppydisc #floppydiscs