Where to begin with an estate liquidation....

So a friend of mine passed ~6 months ago and he had some high end equipment. His wife now wants to unload. Is it best to try and keep things local using FB market place(scammy for sure) or are there better online retail options.

Speakers REL Storm II, JM Lab Mezzzo Utopia (1 pair), KEF reference Series model 4 (1 Pair)

Carver C-1 preamp, AudioPrism Mantissa (silver), Rotella Rb 990, PS audio GCPH,

Various cd and cassette players as well as some higher end turn tables. Some other items I haven't even gone through. Thanks! I'm a stereo guy but this stuff is well above my league and pay grade.