Hmmm. The bag itself seems okay but that horse and carriage plaque doesn't belong on the style and in fact, is a fake plaque.
Here's a listing for the same bag from the same month and plant:
http://www.ebay.com/itm/Coach-Soho-...377?pt=US_CSA_WH_Handbags&hash=item2c69a86be9
Please don't pay for it yet until you get other opinions. You might also want to ask the seller about the plaque. Ask whether it is removable. (Often, fake plaques and nameplates are similar to staples where holes are punched and the prongs are stuck through the bag.)
I don't get why someone would attach that fugly piece of metal.
ETA: I think the bag is genuine and if the plaque can be removed without doing damage, it should be okay. But definitely ask the seller about it.
Ok, got a reply back... I asked if the metal plaque was removable and the reply:
It looks like the metal horse is removable, although I have not tried it. It is held by tough clasps through the fabric.