I was in Toronto last week and saw those prices. The prices was in CDN$ but I converted to USD$. If there are Canadians in here, the locations are the 20 computer stores at College and Spadina...places like Sonnam, Canadacomputers, CNP, and so on.
I bought two Duron 700 (each for $75) and they both can go up to 900Mhz, but my other friends could only get it to 800. There are stories of ppl getting to 1G, but I need to see it with my own eyes to believe it. Just expect to get what you paid for.