namisgr

Hulk head hurt

Same here. Always thought of it as an Atlas pre-hero book. But I totally get why many feel otherwise and find the book tremendously desirable.

Eh, the Registry has never been a price guide, and never was intended to be. It's fine the way it is, doing what it was instituted to do: incentivize collectors to have comics slabbed and to buy comics that have been slabbed.

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Two different titles. The character first appeared in Marvel Spotlight #5 and up to Spotlight #11, all 20 centers. In ish #12 the title was turned over to Son of Satan, as Ghostrider was given his own title. The first five issues of Ghostrider were also 20 centers, before the price raise began with Ghostrider #6.

More comics I bought off the rack. You may be wondering why #1 received the grade that it did - so did I when I got it back in 2007:

This book is so tough to find in nice shape. Yours is in very nice shape, indeed!

More circle 20's. They varied between two sizes without rhyme or reason, as far as I can tell.

Circle 20's are from the brief period at the end of 1971, when the transition from 15 to 20 cent cover price, or 25 cent giant to 20 cent, took place. Afterwards, the 20 cent price was put in a box adjacent to the issue date box.

The first two issues are squarebound giants.

From March, 1972 to the price hike to 25 cents I bought a slew of Marvels when they first came out.

The biggest variable in weight would probably be the inner wells themselves. From one to another I'd expect there to be quite a bit of variation in the weight owing to variations in manufacturing. The inner wells aren't exactly precision manufactured items, after all. The comics themselves also have wobble in their dimensions, and so in their weights, too. Embedding an RFID microchip in the inner well, on the other hand, might be a very good way of assigning a unique identifier to each book via the sealed inner well. They have been designed quite thin, for instance fitting inside the cards of a deck.