Rare Deluxe Editions for 4th Edition.
Please note there are DM notes in these books which have updated stats boxes and other alterations, see photos for some examples. Otherwise the books are in very good condition.
DM guide has roughly 7 pages of alterations
Player's Guide has roughly 45 altered pages of some degree and roughly 8 for the Monster Manual.
Core rulebooks for Wizard's of the Coast Dungeons and Dragons.