That is true. You acn find ordinary melons ar 10,000yen (50pounds) in almost any supermarket. During the season, it is possible to buy some for 500 to 1000yen, although the 3000, 5000 and 10,000yen remain on the shelves (and look identical). I don't know why there are such differences. They are not even different varieties. Just unrefrained luxury...