It depends on where you are, but in many European cities in stores that sell computer games you can find either AoK+AoC or Aoe1+2 for 5-10 €. I know that from several Danish and German stores in different cities, but have heard it from other countries too. It's one of the few games that has been in most stores for more than 10 years continuously.I have both the CD's of AoK and AoC :D , but nowadays I don't know if they still in sale :?
Anyways, I guess in torrent you can find both of them 8-)