
GOOD (G)
A well-read copy with minor tears or splits, slightly soiled and marked, slight rolled spine or creases but still complete and acceptable. Most comics that come out of garages and attics are in this grade and the damper climate of the United Kingdom may accentuate that musty comic smell with the pages very often browning (but not brittle in this grade). There may be a large price mark/bookshop stamp on the cover, some tape (but not excessive) and other repairs, corners of covers may be chipped or other small pieces missing but no more than about a 1" off the corner. Loose at one or both staples, but still quite readable. All the above applies to British comics but again there will be more general wear to the edges and corners. GOOD is basically quite a low grade.
VERY GOOD (VG)
An average, second-hand, obviously read copy with marks and minor defects but still respectable and appealing. Printing lustre almost gone but not soiled or heavily stained and no tape evident, apart from a small piece of magic tape to repair a tear. There is noticeable wear on the spine and even the start of a spine roll and one staple may be slightly loose. The pages may be yellowing with the first signs of slight browning at the edges. The cover could have a tear or crease or the centrefold could have come away from the staples inside. NO PAGES OR PARTS MISSING. It must be complete in every way. For British comics, all the above applies though there will be slightly more edge and corner wear.
A large proportion of British and American comics that you see for sale will be in VG condition or less.
Grading information and pictures provided by Duncan McAlpine from www.comicpriceguide.co.uk