A couple of things:First of all, if a player is on this list, I don't think they are going to have a poor 2010. So this list is virtually meaningless for re-draft leagues.The point of this thread is to highlight players who are still highly thought of, but that you better trade before the oncoming "old age" train hits them right in the eyes.Guys that are studs (Reggie Wayne) one year, fall off a cliff value-wise the next year. If you sold Reggie Wayne LAST off-season, you could have gotten quite a bit for him. Try selling him THIS off-season and see what happens.1. Peyton Manning--Here's the thing about Peyton. He's probably going to be great for another 3-5 years as an NFL QB. But from a fantasy perspective, he's bound to slow down eventually. Dan Marino was a gunslinger who also had a career year at age 33. But after that season, his numbers went down pretty dramatically. Remember what we're trying to do is avoid selling him too late. All it takes is the "perception" in your league-mates eyes that Peyton is old, and his value instantly drops. This might be the last off-season in which you have the potential to get a "king's ransom" for Peyton and it might not. He might put up a 5,000 yard season. But his time is coming soon. 2. At running back, the only 2 I see that apply are Steven Jackson and Frank Gore. I'd be looking to sell both. I fear it's too late for Jackson though. You MIGHT get lucky with selling Gore. You'll need a fast start from Gore. If you get it, I'd sell into that start HARD. 3. Randy Moss. I realize Moss' value has already fallen quite a bit. However, he still could put up a great season this year, and you still have owners who love the guy. He was a top 5 WR last year, so he should still command a pretty hefty price-tag. The problem with Moss is that I have a feeling that he might already have the "perception" of being old, despite the fact that he was a top 5 WR last year. You might make your team worse in 2010 if you trade Moss for a young guy that doesn't perform as well as Randy this year...but look no further than Terrell Owens to see how quickly an older WR can fall flat on his face, and Owens' work ethic has always been better than Moss.Now on the flip side, are players whose values have ALREADY fallen, and who in reality can be had for cheap. Reggie Wayne is the prime example. You can pick him up for much cheaper than last off-season and the reality is that he's still probably a top 5 WR. Any thoughts suggestions or additions would be appreciated