Why does a player start to decline when they are 29 anyway? A professional ball player wouldn't start to go cold that early. I'd say that we change the start of decline from 29 to something like 33 or 34. I mean look at Jason Kidd, he's still kicking butt and he's 38.xD
the player decline also with 33 skillwise(or was it 32?), but like in RL maangers tend to get younger guys for their franchise first.
But i think often older guys a are better decision because of it, they are cheaper and even when they might get worse the overall loss of value is still better then a 21/22 year old who mostly loss value when they didn't get trained.
I think betwen 25-28 maybe it is the best area, because the prices look for me relativ stable.