Three requests do most of the work, and one of them settles which comic you are actually bidding on.
Ask for the indicia
The small print block inside, which states the printing. This is how you know whether it is a first printing or a later one, and the price difference can be a multiple.
Any seller can show it in ten seconds. One who will not is asking you to take the edition on trust.
Ask for the spine, edge on
Stress ticks, rolling and splits all live there and none of them show on a flat photograph of the cover.
Ask for the page colour
White, off-white, cream, tan. It is a real price factor, it is easy to show against a white background, and it is almost never volunteered.
Also worth asking
The staples, for rust and migration. The back cover, which is usually worse than the front.
On restoration
Restoration — colour touch, tear seals, trimming — must be declared, and it substantially affects value.
Detecting undeclared restoration takes equipment and experience, not a video call. If the value of a book rests on it being unrestored, buy it graded or buy from somebody who will stand behind it, and rely on the protection.
Questions people ask
What does a graded comic mean?
Assessed by a grading company and sealed. Common scales run 0.5 to 10.
Is a reprint worthless?
No, just a different item at a different price. The problem is a reprint sold as a first.
Does page colour really matter?
Yes, more than most new buyers expect.
What if it arrives with damage not described?
Seven days from delivery to raise it.
More: condition words.