I was there, I thought everything was really high, Which I guess was good and bad news. lol. The Blue Crown went for I think $1050, The gold one was $500, The milk white crown $300, The red one with some sun fade on one side was $350, The vintage clam shell one was $750 great shape, like new. If this helps.
Large Shell, Sinclair, and the Texaco outdoor signs, went for over $1000 each.