I remember years ago, going to the arcade auctions, and the auctions would take a check if you had a specific letter from your bank, irrevocable letter or something like that.
I always brought... cash!
My first coin op auction, a guy saw me looking at a GNR, longingly. He asked me how much $$ I had, and I said I had $1200. He told me, I won't even take all your money! He pulled the GNR for a grand, and I split the fee the auction company charged him to pull it.
Those were the days!