I have up to 10 sets of Wilson Sensation 16 strings (First quality strings but in clear packaging). These are NOT demo strings. I received them directly from Wilson. I would like to trade for Polyester strings. I will consider almost any brand, except Gosen. Please e-mail me at: email@example.com. I would also trade for a racquet if it is a Pro Kennex 5g/PSE or maybe even a Wilson Pro Staff ROK.