The B version, so it's the UK version. THere was one, boxed and all, on the MVM auction more than one week ago. Wasn't more than about 15 tot 20 euros, I think.
It should exist an explanation... looking at the seller store there are other items more accuracy as a TRS-80 for 49,99$ or an Apple II for 89,99$. Probably MSX in US was very rare, and the seller thought a Sony HB75 is a very rare item everywhere...