Camera and Lens Grading

MINT
Mint is perfect. There cannot be mint+. If there is any flaw, however slight, it's not mint. You will find I don't use mint very often. Every time I do, I get nervous that I missed some little flaw.
New
Many people use new and mint interchangably. New means it has never been sold retail. I have seen items that are new, that have been handled enough before being sold that they are no longer mint.
Mint- (Near mint)
Mint - is very close to being mint. There are only one or two small flaws that you will really have to look for to see.
Ex+ (Excellent plus)
Will show a few signs of wear, but is still a pretty nice camera (or lens, or whatever). Chrome cameras may have a few light bright marks, black cameras will have very limited brassing.
Ex
At this state, there will be definite signs of wear. There will be signs of use, but not abuse. Expect some bright marks on chrome cameras, moderate brassing on black ones.
Ex-
This is where cameras start looking a little ratty. There will be signs of heavy use, even some abuse. Expect heavy bright marks on chrome, fairly heavy brassing on black enamel. There may even be a little brassing on chrome.
VG+ (Very Good plus), VG, VG-, Good, Fair, Poor
Now a camera listed in good condition is most likely to be an eyesore. All of these grades represent various shades of ugly