WHAT IS LOVE????????? BABY DON'T HURT ME!!
in response to your question.
i find crts all the time for free. people just toss them out when they get their flat screen tvs. (beware of infestations though. picking up used furnitures and electronics on the street side can be VERY risky sometimes).
Other than that. my first CRT bought for smash purposes while i was in undergrad was found on craig's list. i found it for $15. You can find many people selling CRTs on craigs list and kijiji.
Make sure to ask the seller if it has jacks for gamecube/wii (the red yellow and white jacks. at least yellow and white is needed. red is optional).
let me know if you still have trouble finding it. there are lots of CRTs for sale and it's very cheap.