Opppss, sorry, I was "despistado" and I didn´t see this interesting topic. Yes, the cheapest price is 2.000 pts, you can get tickets in Rayo Vallecano stadium (for the Rayo supporters zone) or directly in At.Madrid stadium. There is a lot of public transports to Vicente Calderón stadium, local trains and metro (Pirámides), or the bus lines 36 , 17 , 119 , 34 and much more...
By the way: AUPA RAYO!!!