Did not read past the first 4 or 5 posts yet, but I am one of those who has been on a safari from an Auction Hunt. 2 of them actually; 1 in Africa and another in Argentina. My brother purchased both at SCI banquet events for a local chapter. I don't recall the exact organization/event, but you get the idea.
1st was Africa, hunted in 2017. I have a full write up of that hunt somewhere in these forums, but I'll give a synopsis here. The package included day rates and a $500 trophy credit per hunter, 4 hunters going 2x1. We paid about $400 per person (3 of us instead of 4) for the auction, I don't recall exactly the price. Airport pickup was an extra cost. All the usual exclusions (dip and pack, gratuities, airfare, etc.). And they had a 2 trophy minimum per hunter, but no restrictions on what those were, it could be the 2 least expensive trophies if you wanted. I never felt any pressure to shoot more or animals I didn't want. I did spend a lot more than I could have had I bought a packaged deal from any numer of those advertising deals on this site, or what I saw at DSC this past weekend. Some of that was naivety, some because I didn't know if/when I'd ever go back. My brother shot only 2 animals because he had another hunt (that ended up falling through) lined up to go back the next year with some included trophies. ... overall, it was not the "deal" it seemed to be by buying it cheap. I'd absolutely do it again and not regret it but I think same or better values can easily be found.
Hunt 2 in Argentina was easily the best value hunt I've ever been on. My brother gifted me the hunt as a present and I don't know exactly how much it cost him, but I know it was a steal. It included 2 red stag, 2 blackbuck, 1 water buffalo and all day fees and transfer from local airport. I did add some wing shooting and other activities, but that was purely by choice and not in any way pressured to do so. I also hunted for a 2nd blackbuck when i had an extra day after completing my original two, but told them I was only interested in finding an exceptional trophy, not taking another of same size as the first. Another day I went for feral ram but we didn't find any. ... For this one, I wish I could find another deal as sweet as this one was. I've looked for them actually, and would jump at the chance to do it again.