My son has successfully bid MSP-AMS a number of times. He tends to get USAir. I don't know the exact savings, but he feels it worth his time and effort.

Bidding is of course free, so all you waste is your time and effort.

There aren't a lot of reported great deals, but one never knows. They can happen.

I don't see the capability of bidding open-jaw, but there is one-way bidding.

Betterbidding has information on how to get many bids in the same 24-hour time period.

Romelle