I think Atom is the best wholesale marketplace because you can remove most of the weeds by showing only premium listings. There are a few pieces of gold in the standard listings too and if you want, you can search through the junk to get to them.
Why is this important? Because there are people who would be happy to handreg 100 domains in a day if they could quickly double or triple their money. But the quality of those domains would likely be very low. So any low price marketplace would likely be quickly flooded. There's been a number of small auction sites and marketplaces over the years for domains and with low barriers of entry, the quality of what has been available has been pretty low.
With Atom, there's some trust in their AI to value domains. It has room for improvement but it gets results as we see daily sales at retail on the marketplace. So when looking at a domain that's listed at a 10k retail and priced wholesale for $100-$4000, there's a little bit of extra confidence in those values versus me posting on Namepros that "Google is a billion dollar company therefore Xooxle is also worth billions but you can have it for $50. And here's my apples to oranges reasons why."