http://www.cool.co.cr/cgi-bin/prop
This Real Estate page has an online book concerning the legal and administrative details of buying property in Costa Rica, and links to two local legal firms specializing in real estate. You can also find a link to CINDE (Costa Rican Investment and Development), a private, non-profit organization devoted to contacting, and advising foreign investors regarding their operations in the country, and a link to tourist information.