Yeah I found this guy in Texas too! So FINALLY I have Spidey's nemesis. I am still missing Venom, Carnage, Shocker, Doc Ock, Kraven, and Mysterio....All who are left in the MU line. My Green Goblin memory is in 1980 when I started reading Marvel Comics. Bart Hamilton was under the mask.
But hell I didn't know Bart Hamilton from Harry Osborn at the time. I had found this in a back issue bin at the local comic store. I loved the story. I loved the Goblin. My first real kind of Goblin story started with issue 238 when Roger Stern introduced the Hobgoblin...Ooops...Yeah I need to get him too!