A spanish guy has created a web site where he sell lottery bollets of 5 euros in which the prices is his own home!!
The web advertise that you can get a home for 5 euros (the price of the bollet).
This is not a new idea, a couple in England tried to do the same thing over 20 years ago, price of the tickets was 10gbp. They took a lot of money but had to return it all , as it was deemed illegal under UK law at that time.
Assume it might be ok there now to do this type of deal.