Realistically technically the buyers fee is a seller cost as well. You would have to do something horribly wrong to actually lose money on a coin you sold, but every penny from the total price that seller doesnt get is a fee to the seller
It's even simpler than that. The buyer could bid full price and then some, but no matter the price the seller owns the coin. Anything that goes to anywhere else but the seller is a fee for selling it.
I agree! Some "extra" charges at HA went up a couple years ago. Factoring in and anticipating those charges to my bids, I found myself consistently being outbid. So, I pretty much stick with GC which I find to be very reasonable. Even better are the local coin shows.