I do my bidding during lunch time (GMT +8) when there's not much competition for normal good quality players. But during tht time, the SAs are also hot items so I usually stay away from any bidding wars. I've gotten lucky sometimes with SA players, I remember getting one for just a token as the other guy simply a bid and left. A few others cost me abt 3 token, which I consider cheap for a SA player.
Guess it all depends on dumb luck and timing.