Agree about the trap.

One thing that I find interesting about Bohnanza is how the question "what is the current market value" isn't always "what am I getting for it" (as in receiving a bean card) and that changes by player count and groups to encompass "sometimes I'm getting out of a jam." For example, at 3p, I'm more likely to find that I have to offer something else out of my hand (and I would argue, for flow purposes, probably have an incentive to) to sweeten the deal, or even just give it away and offer something to get someone to take it. That leverage fades as you add more players to the point where at 7p, I find it's more of an auction as there are multiple people interested in the beans on offer courtesy of so many fields being in the game.