Our guild uses the second bidder feature, but modifies the cost to be second bidder + 1, so that the raider is actually paying more than the second place was willing to spend. This is not so hard to do manually, but if it was automatic we could kind of just forget about it.

I intend to dig into the code and try to implement this one, either way would consider it low priority.

This might be doable once I can get to it. If you'd like to implement it yourself feel free to do so. In 2.1 line 1087 in Bidding.lua is what changes that:

if mode == "Minimum Bid Values" or (mode == "Zero Sum" and MonDKP_DB.modes.ZeroSumBidType == "Minimum Bid") then
	    if MonDKP_DB.modes.CostSelection == "First Bidder" and Bids_Submitted[1] then
	    	core.BiddingWindow.cost:SetText(Bids_Submitted[1].bid)
	    elseif MonDKP_DB.modes.CostSelection == "Second Bidder" and Bids_Submitted[2] then
	    	core.BiddingWindow.cost:SetText(Bids_Submitted[2].bid)   <-- right here
	    end
	end