Obviously a deal was made cash in hand so they don't need to pay eBay fees. This box has problems with the speaker plus a break. Who knows, it could have been a donor. I tracked ebay listings for a few months and it is very hard to find something that is ok. The last good m90 I saw in the UK was someone selling their dad's machine, for something like 500 pounds, it happened cash in hand, deal off ebay (listing ended early) and immediately the buyer relisted it for 2000 pounds. I know because I wrote to the first seller to check if this is all a scam. The box had some initials scribbled on it so you could easily recognise it. The reseller didn't do a good job with the listing and tried a few times; and managed to get something like 1300 so doubled his money. But I don't like people trying to make money like this out of a hobby, without even adding one bit of extra value in the process. Even finding a steal in a charity shop, one should leave a bit more. And then if you restore a machine, then you are right to seek a profit to cover your time and skills. But if you are just flipping , it sounds wrong. So in my ideal world there will be no car resellers and no flipping real estate or boomboxes

As for collector well-kept machines, there are a couple for ~3000 (Euro) in Germany and Italy and I think it's probably worth it even if it seems a lot - especially if you cannot restore it yourself (and it can be risky if you have a problem with the deck or the volume pot or blown speakers). I thought walkman prices are high, but wait until you need to pay an expert to restore it. Restoring is a proper skill. There is a famous shop in the US that restores Nakamichis and it could cost something like 1.5- 2k to get them to restore your Dragon.