Unfortunately, as expected, it is complicated Gene. The auction site is not the "owner" of the images unless the site produced the image. In the early days of PictureTrail I was given permission by Greg Martin Auctions to use a bunch of Baker images that their photographer produced.
On a public use auction site like Gun Broker, the image is the property of whoever originally posted the image, not Gun Broker. Just as images posted here are not the property of DoubleGunBBS.