I hope you did, but to answer your question, I do have Amazing Spider-Man #6, which is the first appearance of the Lizard. I got it a loooong time ago (Maybe 20 years. I remember getting it.), and it wasn't in the best of shape, but it's Amazing Spider-Man #6, so what are you going to do? I also have the first issue of the first Peter Parker; Spectacular Spider-Man. I don't own that many Silver Age comics, but there are a few more. Now, stop keeping us in suspense.
No, I don't have an amazing fantasy 15 or an amazing #6 yet. Lol. BUT.... The issue I just got is much more rare (although also not worth nearly as much as those). Before this pick up, my rarest book was probably my gold UPC variant of the McFarlane spiderman #1 that was only available at Walmart or the ultimate spiderman #1 blue version that was only available at target. Those have less than 10,000 print runs each. This one is more rare!