A real estate agent is often a self-employed trader, what properties to buy or rent conveys. Depending on circumstances and the country can broker.
- The landlord / seller commissioned and paid for
- The landlord / seller asked, but the tenant / buyer paid.
There is of course free to anyone to hire someone to find an apartment for rent. Such services are, for example, by expats often claimed, since it is not for non-local knowledge is so easy to find an apartment. Broker of this kind are rare and their compensation is complete negotiations by the client.