I have an original EE dac with the volume control.
There is over $2000 in this dac:
Original MiniDac version
Bolder mod by Wayne - $800
Psvane tube
Silver fuse
Dexa Discrete opamps in U1, U2, U6, and U7
ERS cloth under the lid & isolated signal wires inside
This unit punches way up into the $2000-$3000 dac ranges. Way outperforms the stock unit. The USB is disabled - per Wayne it was not very good in the original unit.
I'd like to get $1350 for it.