Your best bet is to log on at odd hours and check to see what is happening, usually late at night or early morning, you will have less competition. But it varies, you have to just look.

My strategy is odd hours, and I "favorite" (the little plus sign on their card) players and see if anyone has bid, I only go for players no one else has bid on, or if the bids were long ago (this requires checking on them every so often). I usually get guys for one to 5 token. I am willing to go higher than that by far, but I stop myself at a number I decided on long ago.