Unless you love to suffer, do not sign an exclusive listing agreement for your property in Costa Rica with any real estate agency, no matter how sexy, famous, smooth, handsome or successful the agent who promises to sell your property next week is.
Why should you put all your eggs in one basket and sign up with only one agency? Will your property sell faster if you sign an exclusive listing agreement with one agency or not and what are your options?
As you probably already know, anybody can be a real estate agent in Costa Rica, some are trained and others are not. Real estate in Costa Rica is not regulated and there is no formally functioning Multiple Real Estate Service (MLS) that covers all the property listings in Costa Rica by real estate professionals, as is customary in other countries like the USA.