Surely your giving them away at 200 quid. Would you like mine at 100 each ? 100% profit can't be bad. Its car boot season again, Im sure I can pick up another 10 by christmas. I stuck my nose up at one last week because it didn't have a psu. 10 a penny, there are nearly as common as bread makers.
They probably got them for next to nothing anyway, and they've been breaking them for parts and the box (where do you think they get them for the refurbs?). Chances are they've already made the money back a couple of times over. For comparison, a new in box PAL Taiwan Megadrive II (a really rare model, Japanese case but european internals) goes for £20 plus shipping. I'm not too much of a fan of amigakit's buisness model.