This always signals to me that thee is something wrong with it and they have taken shitty photos to hide that fact. 99.9% of the time I don't bother to even follow it up.
That's what it should mean. but I don't want to know which figure they pulled to pieces to count all the parts, especially if it's a G1 toy.
Theres a guy on eBay that often lists items as 110% complete as it comes with more spare missiles than originally out of the pack. or a spare leg or something.