I usually bid on any IFA that is good, regardless of position. If the IFA is of a position that I need, I bid more aggressively. As alcheez mentioned, it's never a bad thing to make someone else pay more, because that sets you up better going forward. Or, if you "accidentally" win the bidding war, you can always trade him (or the player blocking him) at later date for something that you want. Anything is better than being left holding on to 15 million of prospect cash at the end of the season.