Help a newbie determine the resale value of equipment

I'm wondering what is the resale value of the following items (mint condition): 
Soulution 760 DAC
Soulution 720
Kharma Exquisite Reference-1D
Simon Yorke Series 10 turntable with S7.1 tonearm
DCS Scarlatti

These belonged to my father who passed away in 2018 and all the equipment was subsequently handed over to a local seller that year. I'm looking for secondary input as I have no knowledge of the hi-fi market.

Any help would be appreciated!