I can't comment on authenticity (that's Audreylita's and Shuze's areas of expertise) but I would think that the seller's ID of goodwill723 's selling ID could be challenged by the charity Goodwill Industries because it's so similar and can be mistaken to the various Goodwill ebay sellers as one of their charitable IDs.
I think this seller is trying to fool buyers into thinking she's part of their organization and as for legitimate (from the charity) Goodwill listings, they often have fakes and getting them removed takes a rare alignment of the stars and a full moon!I was thinking the same thing. Plus not somewhere I would not trust authenticiation of high end goods.