Have you sent your unwanted car to the Auction recently.I sent...

Have you sent your unwanted car to the Auction recently.

I sent mine to a popular Online Auction last week for
a seller's fee of $650. I signed the 5 page fine print
contract ...no worries.....when sold it will only cost me $650
and for a $10K auction price car, that's fait enough....eh?

But once listed I discovered that there was a 20% buyers fee
tacked-on and for a $10K car that meant a total auction commission
of $2650.

This, IMO, should contravene the law of agency because by definition
the Auction House was my sales agent and should have only acted for
and being paid for by me.

Given that the buyer paid the auction house over 3 times what I paid
the Auction house for the sale, can it be fairly said that the Auction house acted
on my behalf:

The washout

Buyer paid $12K for my car
I got $9350 for my car
The Auction house pocketed $2650 for the sale.

I guess, in this case, its "let the seller be aware"