Did not mean to rain on your parade - just to give you a bit of a reality check. Some of the regular DKs are listed for $300-400 on ebay etc., but very few sales are done at that level - most trades are are in the mid $200 range.
Not sure how many of the Monster version were produced, but suspect that it was more than 100 as they seem to be for sale everywhere (there is one guy on ebay selling 3 of them!). Regardless of how many are out there, the Monster ones tend to sell for quite a bit less than the regular boards - most ebay transactions are around $200 or so (some as low as $170).
Not sure why the Monster edition goes for less. Possibly because lots of them were given away in raffles/prize draws and many winners are dumping them for cash. Or maybe people just do not dig the black top sheet and more muted graphics? I actually think the board looks better that way, but each to their own...
Anyway, good luck with it.
EDIT: All of the prices in this post are for brand new boards (just to avoid confusion).