Going up rapidly, benish, at the moment.
A Piper PA-28-150 Cruiser from Cuatro Vientos is around 110,00 € per hour wet, including landing fees, although you often have to pay a monthly fee too, depends on the club.
You can find Technams registered as class A for less, but not in Madrid, more away from the cities.
hughesyd, if you want any company fell free to get in touch, and anyone else thinking of flying round here