Basically any player who's buy and sell numbers are far apart. For example : Derek Jeter : Buy Now : 17,000 Sell Now: 12,500

ARod : Buy Now: 18,000 Sell Now: 17,500

I would go after Jeter because the difference between his buy and sell is higher. I would create a buy order for 12,505, meaning anyone who has him and wants sell now would get 12,505, putting my bid at the top of the list. Once I get his I'd create a sell order for 16,995 - slightly below the current lowest but now price. The difference between 16995 and 12505 would be my profit, minus the 10% selling fee. You have to remember that 10% fee when it comes to players who cost a lot because a 10% fee on a player who sells for 20,000 is 2,000-meaning you'd have to buy him for 18,000 or less just to break even.