Go with the used monitor they are offering (hopefully the packing will be better). I bought the factory sealed wells-gardner from this ebay seller and the factory packing was terrible. There was absolutely no styrofoam or any packing protection for the rear of the monitor. The tube on the yoke was shattered and the back plate was hanging loosely. (All it's good for is parts) It arrived in a sealed 19" monitor box, which puzzled me. They told me at midwest digital that wells gardner ran out of 18" monitor boxes when they produced these.
Again, get the used since they will do the packing for you.
They are 18" d-9200's. They can fit in a 19" space and my atari bezel does fit it (almost). Unfortunately, I could not power it up, but they are XGA.