I know this doesn't answer the question, but I first thought you meant 'herbed' as in 'covered in herbs'.
That was my reaction. Maybe it's a magic weapon property: anything you kill with it is made tasty and edible. +500gp should do it.
As for the bed, maybe 100-200gp if it's clean and intact, including all the sheets and other stuff. The book doesn't really give much to go on, so it's rather a matter of how you described it. If it's a big four-poster, carved, gilded and inlaid with ivory, semi-precious stones and whatnot, it could be much more. But I suspect it was more a matter of comfort and, er, somewhere for dedication to Lamashtu than the more merchantable qualities.
Sorry -- being from Northern California, there's only one definition of "Herb" or "Herbed", and the price depends on the quality. Humboldt or Simi Valley?
Here's my extremely long-winded take on the bed.
Standard bed = Perhaps 2 days' work plus parts ~ 2 g.p.
Feather mattress = Peasants can't afford it, so figure ~ 10 g.p.
Fine linens = Now we're getting expensive. ~ 50 g.p.
Throw masterwork on the whole thing. ~ 100 g.p.
Throw ornamentation on the whole thing. ~ 100 g.p.
So my total is 262 g.p. right in line with Mudfoots's. We win!
