I get this question quit a bit when talking comics with people. Should I buy only Super High Grade to High Grade books or is it worth my time to buy Mid Grade or even low grade books? I would have to say two things should go into answering that. What reason are you buying and what can you afford?
If you are only buying for investment purposes and want to make a quick profit and turnover books quickly. Absolutely go Super high grade and high grade books all the way. Now you can buy mid grade and even low grade books for investments, but know you will need to probably hold them longer to allow prices on these to move up significantly enough to make a noticeable profit.
If you are buying just for your own enjoyment and love of collecting, then mid and low grade books are probably just fine. Especially if you do not have a budget to buy a graded 9.8 Fantastic Four #48. But even an ungraded 4.0 will continue to grow in value. Just not as much or as quick.
I have had to settle on a variety of books like a CGC 5.5 ASM #129, mid grade Marvel Spotlight #5, a mid grade Hawkman #4, mid grade Ms. Marvel #18, a low grade Silver Surfer #1, low grade Captain Marvel #1, but I do have a few great books like a super high grade NYX #3, high grade New Mutants #98, a low high grade Batman Adventures #12.
If all else fails, buy a low grade book to fulfill your needs and replace it at a later date when you can afford a high grade copy of the same book. There is no shame in buying what you can afford. Not everyone can afford a CGC graded 9.6 Amazing Fantasy #15.
I kind of use the chart below as a reference. It is not written in stone and you can arrange the way you think, but this is the way I try and work off of.
- Super High Grade 9.8-10
- High Grade 9.4-9.6
- Low High Grade 9.0-9.2
- High Mid Grade 8.0-8.5
- Mid Grade 7.0-7.5
- Low Mid Grade 6.0-6.5
- High Low Grade 4.0-5.5
- Mid Low Grade 3.0-3.5
- Low Grade .5-2.5