Um nope I would return them as I would think finding them was karma testing my character ... I have not read the bible in a while so could be wrong about messages within it- but do not recall a finders keepers psalm and is one of the 10 commandants not do unto others as you would have them do unto you??

If I lost something valuble to me I too would want someone to make every effort to return it to me! So I would do the same thing - even with daring I would either leave it so if someone returned to place they last remember they might find it or take it too keep safe and leave a found sign with contact info.