That is why it is so important to look on the bottom side where there is a plate/sticker with model number. If the seller can't be bothered to turn the mouse around and have a look (given that the sticker still is there), there is no point in placing a bid no matter what the seller claims.
1351 mice are pretty pricy
1352 mice can almost be had for free (at least a few years ago, perhaps not today)