It's BRUTALLY fake. Here's a gif of me turning a shark into a third age plate body in a couple of seconds:
http://gyazo.com/7221f4576291dfb95f674560bad3f5ae
(Note: That is a gif not a picture, watch it for a few seconds for it to appear).
Everything that says 'shark' will be replaced by the word '3rd age platebody', including when he tries to alch it (if the item he's alching is worth more than 500k/1m, so he gets a confirmation message before he alchs).
So for example, if he uses cheat engine to turn dragon platelegs into a 3rd age platebody, even when he alchs that item, it will say 'are you sure you wish to alch third age platebody?' and show a picture of it, although the real item is dragon platelegs.
Tl;Dr He probably lost about 5-6M aching those items, claiming to have lost 1-2B or however much the items add up to, to help to 'promote' his site.
The items were things like dragon platelegs or some low value item that gives a warning message when you alch it.
