If youre looking for a bike in Finland I would suggest first talking to the owners for a bit until you ask them for a receipt. Sometimes they have already posted a picture of the receipt in the pictures of the bike. If they dont you can always ask there’s nothing wrong with that. Sometimes the person that is selling there bike might not be the first owner but might have pictures of the receipts that the first owner might have show'n them. You can also ask for the frame number if they dont have a receipt ofcourse there’s nothing wrong with that either and if they wont show that either the bike may be stolen. PS there is a forum on this website where you can post a topic like this to say that youre interested in buying a hybrid bike.
The word ”ostetaan” means that youre looking to buy a bike.
Chris