I would say that first ad looks a tad dicey to me you can't really see the amps closeup in the pics. The second ad looks much better and is also on this site:
https://www.audiogon.com/listings/da-converters-kondo-audio-note-japan-ksl-dac-euro-price-2016-10-01...
The seller has good feedback just not a lot of it, so proceed with caution. And as regards pricing, Kondo gear is super expensive so if you're looking at it you should be prepared to pay for it. Good luck!
https://www.audiogon.com/listings/da-converters-kondo-audio-note-japan-ksl-dac-euro-price-2016-10-01...
The seller has good feedback just not a lot of it, so proceed with caution. And as regards pricing, Kondo gear is super expensive so if you're looking at it you should be prepared to pay for it. Good luck!