I might be willing to pay good money for Fed gear - if only I knew what it looked like. The way current day tennis apparel is so generically styled, I'd be hard pressed to associate certain lines with certain pros. I'd much rather pay the same high dollar for an instantly recogniseable design (anything 80s, anything Challenge Court) than a monotone Dri-Fit shirt with a hokey 'RF' printed on the bottom of the placket.
Can you remember the exact design Fed wore at FO '04? Or recall what shirt Rafa wore at USO '06? Nope, neither can I.