Firstly, this could go in the eBay tat thread, but since you are new to the forum I'd let you off....
The bat looks authentic, however I would be concerned with the lower sticker at the front of the bat, seems a bit low, also there is a logo on the sticker, which looks like quite an Indian thing If you look around eBay.
I'd ask for a image of the toe, which should show a Kookaburra toe guard, the top of the handle, which should show a Kookaburra sticker and a stamp on each shoulder of the bat.
Hope this helps, and welcome to the forum.