I have a used Wilson KSix One Pro Tennis Racquet (Federer version 41/4 grip size) for sale. Condition is good (9/10). Selling it because I am buying a 4 3/8 size. Price is firm because I bought it at the same price just few days back in this very site ! Never played with it. Here is the specs/review given in TW : http://www.tennis-warehouse.com/reviews/k61t90/k61t90review.html This was the version that Federer used before the newer Blx version. I will share photographs on request. Will take PayPal or any other secure form of payment. Price of $90 is including shipping. Will also take Trade, if somebody is willing to take the KSixOnePro 4 1/4 and give me a 4 3/8.