

This, at least, is not entirely true. OD&D does not have any distinction at all between male and female characters in the original 3 pamphlets.
Pretty sure that stuff came in later, post-Greyhawk. It certainly showed up in fanzines of the late 70s, though…
Worth more than most copies you find online because the box looks in nice condition, but not especially valuable. They printed a ton of copies of that edition, it was very popular in the 80s.
Maybe consider playing it? I really like the way the Basic Set plays. Very different from the modern game.