I know a guy who took his collection to a well known dealer to sell , the dealer said he’d give him 60% of the market value , trouble was the dealer didn’t give him the market values, the guy trusted him and at the time he wasn’t savvy with the internet and trusted the dealer , thing is if he were making 40%why not be honest on the valuations. I don’t know if this is relevant to “why prices are rocketing “ but just thought I’d tell it so some potential sellers can beware of some shenanigans