Where can you buy Real Madrid Tickets?

[Noodles21]

I am looking for Real Madrid Tickets as my family and I have payed for my Dad to go for a 5 day city break as a suprise for his 50th birthday and would love to send him to watch Real Madrid too as it has always been one of his dreams. However, I do not know where to buy good tickets for a reasonable price. Anybody have any ideas? Please post me back or e-mail me at ninoobeesley@hotmail.com

Thanks xx