In the selling section of the rules it says you can bid with your ”current auction cards". What is the meaning of the word "current" here? Can you bid any of the auction cards in front of you? Are there any of your auction cards (either the one you were given at the start of the game or any you have won since) which are not considered "current"?
My guess is that you can bid any of them. Perhaps the word current is a left over from an earlier version of the rules?