Really nice 'portraits,' with excellent tone and detail sharpness throughout.
I hope you're thinking of using them in some kind of online gallery, ideally with technical specs and maybe a few sample photos from each camera/lens!
If you're looking for ways to enhance this kind of photo even more, here's an idea with which you may want to experiment: work with some small white fill cards, placed just outside the image area and positioned so that they are reflected in glass areas of the camera, such as the lens, viewfinder window, etc. By experimenting with placement of the cards, you can get nice, even reflections that help define the shape of the glass. (I picked up this trick photographing food, which also has a lot of shiny spots that look better if you give them something to reflect.)
But these are still really nice photos as they are. Everybody who has tried to sell something on eBay knows it's really hard to get such a good photo of a camera, with all the engraving sharp and good detail in both the black leatherette and chrome parts!
