100% regarding the pictures.
In my experience you can't post too many pictures and a video really seals the deal. It gives people something to fawn over and paints a picture in the mind. I know that anyone who wants to buy one should know what a JP2 looks like but it's nice to see the actual unit that you hope to own.
Personally I can't get enough of looking at pictures of machines I'm keen to buy. Often I'll paw over them several times, watch a tutorial on the game then look at the pictures once more. I think I'm a bit of an obsessive idiot but I honestly can't have too much information.
I'm on the same level too. With older machines I go and see Todd Tuckeys review on you tube and do a bit of research.