I bid there, but rarely win. Same methodology, I have one bid say $500. If there is $400 in BP and $50 in shipping I bid $50.
The problem is those bids are a waste of time. It makes me wonder if certain well heeled buyers are bidding without the BP.
Either way, the auction house gets not a penny more than what my bottom line is.
This auction house is well known for the in-house shill. One wonders how many books the auction house takes back and sells themselves while taking from the sellers a significant amount of ROI.
If I sell a $1K book that goes for $850 and nets me that less the SP and the auction house is the buyer, then they get to double dip their fees and resell for 1K later and pocket yet more profit.
If I sell on CC or Clink I am fairly confident that the final hammer (knocked down by excessive fees) did not go to an in-house shiller who is going to take yet another bite at the apple on the resale.