I think the issue here may be, "is dirt the same as wear?". Certainly the dirt quite substantially reduces eye appeal and therefore market value, but unless one is going to net grade, it doesn't alter the technical grade. I can only see the one corner crease, and suggestions of other little margin folds, but as Alvin says it's hard to decide from these low-res. pictures. Best case scenario, therefore - EF with impairment, ie. dirt.