Karen,
In the past each GW seemed to price the shipping at their own whims. I think they were trying to make up for some low bids by jacking up the shipping and handling prices. I simply checked the shipping before I bid and refused to bid on those that were gouging the bidder.
When they attempted to revamp their system I noticed that their shipping costs were reduced significantly.
But they've had a lot of trouble and as of the last notice we got from them have reverted back to the old format. Sooo ........ buyer beware.
Joe