Отправил вопрос владельцу. Ответ:
The yacht is presently located in Greece and is owned by a company, which is based in Finland. I agree there is some ambiguity in the ad because the site could not accept the kind of ad, which would have been unequivocal for my purpose. The ad fails to convey my intention to sell shares (“viikko-osuus” in Finnish in the ad) of the company, which entitle the owner to sail the yacht for one week per share. The price in the ad is for one share.
Совершенно верно, я еще 8-го числа попросил друзей, живущих в Финляндии, связаться с владельцем по телефону. Им было отвечено тоже самое