
I've bought a broken MSX1 from Bas he claimed was fully working (one of the letter keys isn't functional, it's not fatal as I can do KEY1,CHR$(xxx) ). This concludes not every seller's perfect.
BUT.. I'm sure he'd repair it for free (sans postage costs) if I'd ask him nicely, whereas people from marktplaats or ebay will rudely ignore you or claim it was sold 'as is'/untested.