Graded comics are fast becoming a huge part of the Comic collecting world. Fans across the globe send their comics for grading and receive them back in plastic air-tight cases.
The main grading companies are CGC, CBCS and the lesser favoured PGX, whose reputation seems to have taken a knock in recent times.
We will buy graded comics but it is unlikely we will pay what you are wanting for them, so often a deal cannot be achieved.