The KEH definition of excellent reads
"EXCELLENT CONDITION." 80 to 89 percent of original. Shows moderate wear for the age of the item, with the possibility of small dings or blemishes. Glass may have slight blemishes but will not affect picture quality.
eBay specifically defines "Mint" as
An object described as in "MINT CONDITION" means, literally, that the item looks as if it just came off the assembly line in the factory; that there is not a single defect of any kind in the product. It is in the BEST possible condition a product can possibly be in.
It is obvious that Mint does not apply.