I tried selling one at Gencon this year for $200.00
But... it had the original mailing envelope, thank you letter, and that year's catalogue.
You should get around $40.00 - $75.00 for it.
RPG’s, D&D in particular has had a major influence in my life. It’s bonded me together with life long friends...it’s that bond in life not just as friends, but in our jokes, our mannerisms, and what we find funny. Invincible Overlord