Except as provided in ss. 170.105 and 170.12, if a person finds $25 or more or any goods having a value of at least $25 but less than $100, and if the owner of the money or goods is unknown, the finder shall, within 5 days after finding the money or goods, give a written notice of the found money or goods to the law enforcement agency of the city, village or town in which the money or goods are found. That law enforcement agency shall post a notice of the found money or goods in 2 public places in the city, village or town.