I can't imagine many people buy a wireless router based on how it looks. Most likely people would be more interested in the back end of it, how many ports it has, signal lights and that sort of thing. You want to have a site with 1000s of products but the main information about them is likely the same or very similar. Get an illustrator to make you an image set of the various port configurations and use them for each item to show information that matters to people, rather than showing meaningless photos of the front of a router.
Getting a full set of nicely made illustrations showing each possible hardware configuration will likely cost you a few hundred bucks and take a few days, and be much easier than collecting 1000s of pictures nobody really wants to see anyway. The manufacturers' manuals are filled with illustrations in most cases rather than pictures because the schematics matter more than the visuals...
Just my 2c