Has the DAC90A bubble burst?

[pamphonica]

Sadly the DAC90A bubble has seemingly burst. The last DAC90A fetched just £10 at BVWS auction, down from £30-£40 a couple of years ago.
I'm happy with my remaining pair (one brown, one cream) whatever their worth. Quite comforting radios to listen to, even of it's just Talk Sports and Indian stations from Southall!
A pantry transmitter is essential, not least to provide variety.
-Jeremy