So don't read this article if you don't like spoilers.....
Warning you.....
Warning You Again.........
Don't say I didn't warn you........
Here you go:
Amazing Spider-Man 798 is definitely the first appearance of the Red Goblin it's not a Cameo. Also the Red Goblin is Norman Osbourne !
And here he is :
There you go print run is 250K which is huge 
maybe worth flipping maybe not, will keep an eye on prices !!!