Let’s say you have a new home with a smallish garage and a full size car.
You are bidding to park the car in the garage. You estimate where the center of the garage is on the back wall of the garage. You aim correctly and end up scratching the right side of the vehicle, which then must be repaired. You are surprised at the cost of placing your bid to park the car and incurring the parker’s Premium.
When completed, you pick up the car and bring it home. It needs to be parked in the garage. Do you follow the exact same process to park the car and repeat getting the same result necessitating another visit to the body shop or do you make an adjustment to your aiming point and move it the required distance to the left, which results in the car not being scratched on the right side.
On the third day do you repeat the unsuccessful process of the first day or the successful process of the second day? If you answer the former, I cannot help you. If you answer the latter, congratulations. You have learned the impact of the buyer’s premium on your bid to park the car.
Being surprised by an auction house invoice, due to naïveté, not reading the rules, or whatever, could conceivably happen once to anyone. But if you are continually “surprised” by invoices, you either need a smaller car, better reading glasses, or a home without a garage. You might also consider a membership in the Audubon Society as an alternative hobby.
Hope this helps.