I just bought a set of Campy Mavic Aksiums from Nashbar for $130. I haven't mounted tires to them yet and was offered a deal at my local shop. They have a used set of '04 Ksyrium SSC SL's with a new Campy Cassette and Pro2 tires and they want $200. Should I send my Aksiums back and pick up the Ksyriums? They do show some rim wear, there is a slight groove in the braking surface. Otherwise they are in great shape. They come from a guy that doesn't race, but does like to but on some miles. Although he as many bikes that he spreads them out across. He is selling them, through the shop, because he picked up some RSYS wheels and doesn't need them anymore. What would you do?