This is another good Thread. Very impressed here, and I don't impress easily.
The IronMan/Subby's? There HAS been significant price movements in the last 3 years - I started hoarding them 4 years ago. Have sold some of them. I do have some ASM's but only a few # 63. I like # 62 as a personal favorite as Medusa on the cover is, to me, one of the greatest ASM covers of all time. It is also the first one signed by Romita. The # 62, IMO, very hard to get in ultra-high grade because of the white background. I have not hoarded any particular ASM's. Other titles, maybe, but not ASM.
I just like the IM/S...I feel confident that the will increase in value. I won't get rid of them all, just some of them. I still grab up the real high-grades when I can.
CAL