Check out some used music shops. Here in Toronto, I've been finding a lot of used SACDs for around $10 - $20 CND or less, and LOTS of used DVD-As for $10 - $15 CND or less. Just today I found a used 3-SACD set of The Rolling Stones -- Singles Collection: The London Years for only $30 CND!
I remember going into Best Buy once and asked a salesguy where the hi-res audio section was. He just looked at me blankly. Then I said, "You know, SACDs and DVD-Audio discs?" His face brightened, and he said, "Oh, DVD audio! Yeah, they're over here. As you can see, we have a great selection of music concerts and music videos on DVD." So then I had to explain to him the concept of hi-res music. He looked at me confusedly, then pointed vaguely at the CD section. They did have a small selection, but the prices were nuts: the minimum price seemed to be $35 CND for anything!
There are few stores that have a separate section for hi-res music (Sam's here in Toronto, for example), but most do mix in hi-res music with "the general population", so you really have to know in advance what you're looking for.
Good luck with your search!
cheers,
supervij