awright...seriously...
If a well-known, premium dealer puts up a prestige auction for a Diablo..or some six-figure exotic... and requires a pre-approved bidders list.. if you are seriously interested, you play by the rules or walk.
On the other hand, a $30k hotrod on a three-day auction, with no reserve and a start bid of $500... and an explanation about how the car was owned by his brother, who was eaten by his pit bull, after breaking his back skiing....and the car is in Belgium and he is in Portugal.
...and there is a pre-approved bidders list.... are you going to participate? ..or just walk away laughing?