This is an authentic racket purchased through official channels. It is not a counterfeit product. Price is firm. We will block price negotiations, including requests for combined purchases. For multiple purchases, we will discount the second set and subsequent sets by 800 yen. (If a 2-set bundle is already offered, this discount applies to additional purchases.) We will include a warranty card (with the purchase date from Mercari filled in by us) and a soft case. We can string the racket for an additional 1,500 yen. We use a Yonex electric stringing machine. Please comment before purchasing if you have any requests.