Someone got a bargain from Peru.... or did he?

It is a problem since in the scenario I describe, which is seemingly more common in Japan than elsewhere the seller advertising the watch internationally ie in English or another Euro language doesn't actually have the watch in hand. They think they can make an arbitrage buck by adding, say 25% to the local price then telling you you have bought it. The problems start because often there are multiple re-sellers doing this with the same item and as such it isn't always still available for local sale after you have paid and the funds arrived in the re-sellers account which can take time. This is a common complaint about Japanese ebay sellers, often sales are cancelled with no good explanation and your funds are tied up for days. Imagine ebay where everything was listed 10 times with different prices, but the cheapest are in code and you get the gist.

There are ways to avoid this. Do a reverse image search on any images to see if they are listed elsewhere, particularly on a Japanese language site. This will indicate either a scammer or a chancer ( ie a reseller, exploiting your lack of Japanese skills).