As for transfer purposes, the .es market is still very tricky for foreign investors, because you have to fill out the transfer forms requested by nic.es
If you need any Help in this, we can advise you.
We are also in the Domain brokerage business and accept your request, if you are looking for the right Domain at the right price.
Some of our related companies you can see here:
VipDominios
Domain Auctions
Invest in Spanish Domains