Go for it, having 1 player signed jumper for $1k is nice, but for only another $1k you can have the whole team (an extra 22 players and coach) sign. Consider it great value. And when else are you going to be able to get all premiership players and coach to sign in one place.
I have the jumper hanging proudly at home, beautifully made piece and the best bit of memorabilia from the premiership. Well worth it. You will not regret it