The Spanish registry is having a big sale on .ES domains until January 31st 2009 at 12:00 CET. During this period, you can purchase your .ES domain at €1 excl.VAT.

The extension is open to all without any restrictions.

Note, however that you must link your domain name to a mail server (such as GandiMail for example.

The specifications of the .ES are available on this page, and you can view the contract here.