To give the respect due to the inventor of this action (the late Dean Miller) it really should be called the Miller, not the DeHaas.  Miller asked DeHaas to help him market it, and in return they added his name to it for the recognition he had in print.  At the very least, call it by it's formal name the Miller-DeHaas.

Dakota acquired the rights to the newest iteration of the Miller action, the Miller F, in a very questionabe/unethical business deal just before their recent bankruptcy.  I don't know if they are even producing the action, they weren't before the Remington purchase, but might have started it up since then.

It's a good action, too bad control of it's production has left the Miller family.

To answer your question on costs, I heard of 2 unfinished actions surfacing recently, they supposedly sold in the $1500 - $2000 range.  I've seen very nice custom rifles offered in the $3500 to $6000 range occasionally.

dave  

the action appears to be for sale, I believe 1800. Remingtom bought Dakota arms last I heard