Stopping buying is not much of an encouragement to a company to continue working for a certain niche in the market. Sure, we all (well, most of us I guess) would have loved to be able to buy a new PPC board to enable the Amiga to run OS4.x and quite a number would have loved to be able to buy a quick 68k accelerator board... And yes, there have been promises like 'next summer' 'next winter' or 'next x-mass' goods will be available, and many summers, winters, x-masses have passed, it still is a weird 'option' to decide to buy nothing at all just to 'punish' them.
So if you're in need of a product that IS available from Elbox then I don't see why one should not buy that product.