I would bet you money that those board games don't sell very well. Just going by my local FLGS and the conventions nearby, not a single one has been sold since they first came out.
I can also tell you that normal Joe shoppers won't pick up a $100 boardgame.
OK, I don't think anyone except you is harping on the $100 price tag. I said $50. Hussar said $75. For comparison, here are some "basic" board games that you should be able to find in Target, Wal-Mart, Barnes & Nobles, etc. (Except for
Lords of Waterdeep)
Settlers of Catan, $42.
Carcassonne, $30
Ticket to Ride, $50
Dominion, $45
Smallworld $50
Lords of Waterdeep, $50
Forbidden Island, $17
Dungeon, $20
Monopoly, $18-$25
Risk, $30-$60
Of these,
Forbidden Island is a wee little tin box with a bunch of cards, four plastic treasures, and some little people things.
Dungeon is 30 years old and while it's been well-reviewed, I've also seen commentary on the low/cheap production.
Monopoly is boring as all get-out.
Risk - I don't know about you, but B&N only seems to carry the licensed Risk boxes, like
Risk: Halo, and are usually in the $50 range.
Settlers of Catan,
Carcassonne,
Ticket to Ride, and
Dominion are all "basic" entry level euro-games that are widely popular.
I think WotC is going to make a strong push into board games, btw, so expect them to keep mining D&D for material. And expect a D&D game that will sit on the shelf next to them.