Tristo2021 wrote in Rare 2nd printing alpha AD&D DMG:My father donated his old
RPG stuff to me a few years back, and I went to look through it the other day. I was eager to find the older stuff, and was very shocked to find some original Advanced Dungeons and Dragons books, one of which was a Dungeon's Master's Guide. I was annoyed to find pages of the Monster Manual in it, but later was surprised when i found the value of this recalled reprint. Is there anyone here who has any experience selling rare D&D books?
Quite a find, congrats. You will do best to find the widest market (probably E-Bay), although there are other alternatives, such as soliciting offers in the classifieds here, and there is also a facebook group dedicated to gaming sales. Just by posting here, you are probably going to get some substantial private offers as well.
Post photographs that clearly and thoroughly lay out the condition of the piece. Also, you will want to establish that this is the 2nd Alpha print (with photographs) as well.