I respect Jules opinion, and he sure knows a bit more about Foderas than I do. (I did have a Fodera once, and sold it within a year for exactly the same price I paid, and this was a 15-year old bass, which is now worth maybe 30% more than what I paid and sold it for).
Anyhow, we can argue all day long about the value of basses, like what's the actual value (materials and labor) and the perceived value (collectability, age, market demand, and celebrity ownership, for example).
I know that bass would be a really hard sale, regarless whether it's $10K or $4K, but I still think it's worth a lot more than $4K, both because of it's actual value, and because it's preceived value. But of course, everybody is free to have their own opinions.
I also think that contacting the seller just to tell him that he's "dreaming," is wrong, and well, a waste of your time, even if the seller actually is dreaming. Everybody has the right to sell their stuff at whatever price they want, and if you are not interested on the item, why even bother contacting the seller? And I believe that nobody actually considering this bass will be easily "ripped off."
If you ask me, somebody with money (maybe an old teammate or a producer) should buy this bass and put it at a high-profile auction, with the proceedings going to the American Cancer Society. I'm sure that's something that Wayman would have been pleased seeing.