An update. There is a real and respectable company called Zamet who make wire products, however if somebody is contacted by a company claiming to be them, trying to sell used cars etc to people in developing countries and asking for 50% of the money upfront, be careful. The people with the swish website and the too-good-to-be-true offers may not be who they appear to be.
They contacted an ex-student of mine in Africa who asked me if I thought they were genuine. They wanted to sell him a used luxury car (there's a big market for imported used cars in his country) at a very very low price. I did a bit of research online and there are many warning signs. The link below suggests that the people doing this and the actual Zamet company might not be the same.
As always, if something seems too good to be true, it is probably too good to be true.