I think that's a quirk of how this type of auction pricing works more than anything. If everything in the area is going for 20% over asking, then posting a list

I think that's a quirk of how this type of auction pricing works more than anything. If everything in the area is going for 20% over asking, then posting a listing for what you actually think it's going to go for will make it look 20% more expensive than comparable properties, so you may get less offers. So there's this strange feedback loop that happens in local pricing, magnifying the list vs sold price disparity.