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2021 MARKET UPDATE: STICK TO HIGH GRADES
The top tier of books has appreciated more strongly than the lower grades. Nothing is spectacular though. There are hotter books to be found.
My grade pick of CGC 8.0 returned 26 percent.
2020 MARKET UPDATE: CGC 9.8 IS RED HOT, OTHER GRADES SO-SO
Iron Fist 14 has posted a decent gain in CGC 9.8 this year.
The big money is in the very rare 35 cent price variant. If you have one of these, it's money in the bank.
2019 MARKET UPDATE: THIS BOOK IS SHOWING SOLID GAINS
IF#14 broke through some of the price resistance points which had held it back in recent reports, though it's being out-performed by other keys on the 100 Hot Comics list.
Really, there isn't much to say about this book, as rumored (and confirmed) movie and TV shows affect lots of other Marvel Comics characters.
2018 MARKET UPDATE: HOLDING PATTERNS APART FROM 9.8
This year saw record sales of the rare 35 cent price variant, and CGC 9.8 copies also bumped against the $2K ceiling.
Everything else stayed more or less the same as last year. Recent sales:
2017 MARKET UPDATE:
High grade, this book is still a beast. It's setting records. And don't even talk about the uber-rare Marvel 35 Cent Price Variant edition, which is insanely hot.
Any lower than 9.0, and it's like a lump of clay. Repeat after me: DO NOT BUY THIS BELOW 9.0.
Iron Fist is set to debut on TV in the upcoming Marvel series, and it's odds-on that Sabre-Tooth will make an appearance at some stage.
A book you ought to consider is Wolverine #10 from the 1988 series, which features the first Wolverine vs Sabre-Tooth battle. It's much more affordable, though a lot more common in high grade than Iron Fist #14.
Values of this book are complicated by the existence of a 35c price variant. The Marvel price variants were experiments in the 1970s in small test markets.
Our advice is to stay clear of these rare books if you're on a budget, as their value is hard to predict, but suffice it to say if a nice one comes along, and you can afford it, buy it for sure.
For a regular 30c edition, stick to CGC 9.8 with white pages. "Centering" is important (how nicely squared up the front cover is) on books like this, which are desirable but relatively common.
Any advantage you can get when it comes time to sell is a bonus.