I have a few standalone DACs that I'm no longer using. To simplify things, all prices listed include shipping within the CONUS and transfer fees.
Musical Fidelity V-DAC(the first version). Includes power supply. $80
Fiio K11 R2R. Includes power supply. $120
SMSL M100. No power supply included. $50
Angstrom Model 200. This is an older high end surround sound processor but can be used as a 2 channel DAC. I believe it is based on Multibit converters but not entirely sure. Beware: This unit does not have a fixed output. Volume is adjusted from the front panel using up/down buttons and there are only indicators for minimum and maximum output. There is no display indicating actual volume level. $120
Musical Fidelity V-DAC(the first version). Includes power supply. $80
Fiio K11 R2R. Includes power supply. $120
SMSL M100. No power supply included. $50
Angstrom Model 200. This is an older high end surround sound processor but can be used as a 2 channel DAC. I believe it is based on Multibit converters but not entirely sure. Beware: This unit does not have a fixed output. Volume is adjusted from the front panel using up/down buttons and there are only indicators for minimum and maximum output. There is no display indicating actual volume level. $120