Released back in 1978 by Synergistic Software for the Apple II Dungeon Campaign is an extremely early CRPG and a rogue-like that appeared before Rogue. Actually, it most probably is the very first procedural dungeon crawler ever created, and the copy you'll find on this Dungeon Campaign (Apple II) eBay auction is the rarer one. The one before the better known Wilderness Campaign was created and it comes in its original ziplog bag.
Seller ships worldwide. Oh, and did I mention that the seller is no other than John Romero?