Doing a little research for a friend.  Does anyone know offhand what a 1975 Dungeon! in nice condition goes for nowadays?  

Condition notes:

The box has some bowing on the front cover and very minor discolorations around the edges on the back
Cards are unpunched
Map is in good shape, glossy and unfaded
Playing pieces are still in the bag (the bag is stapled, but I believe it came that way originally.)

I have pictures, but for some reason, my picture uploads never seem to cooperate.

Phentari wrote in Dungeon (1975 printing):Doing a little research for a friend.  Does anyone know offhand what a 1975 Dungeon! in nice condition goes for nowadays?  

Here's a recent sale on eBay to give you an idea:  
** expired/removed eBay auction **


Of course, the price can go up or down depending on many factors, the main one being condition.  

Phentari wrote in Dungeon (1975 printing):Yep.  That's my main uncertainty; I'm not sure what an unpunched set commands nowadays.  It's not quite mint, it's not in shrink, but it's still probably the nicest set of this vintage I've personally handled.

Roughly speaking, it's not uncommon for many collectibles to double in price with every grade in improvement (a common grading scale is: poor, fair, good, very good, fine, very fine, near mint, mint).  There are plenty of exceptions to this trend, especially if it's not a widely sought after collectible (which is what I would guess about this board game).  Anyway, if you feel like price of the set sold on ebay is correct ($45), then whatever grade you would give that set would be the reference point, and if your friend's set is one grade higher, it's likely worth $90.  If it's two grades higher, then maybe it's worth up to $180.

However, you need to post plenty of pictures and comments regarding condition on things that can't been seen like smoke and/or mildew smells.  You'd also need to make sure it is packed well when shipped so it doesn't incur any additional damage.  Advertising on gamer forums or Facebook groups can have an effect on it's final sales price.  People have noticed that items advertised here often suffer from what is called "the Acaeum effect," which is where items seem to sell for higher prices as a result.  I'd ship only by Priority Mail or faster/better.