CPU confusion

I’d like to upgrade my CPU but I’m confused.

I have a socket 754 AMD64 Athlon 3700+ (@ 2.4GHz)
when i look for other socket 754 CPU’s all find is 3200+ (@ 2.2GHz). There all slower than my current one. Id like to go for a 3800+ which has a FSB increase of 200mhz over mine, but i cant find it. I remember when buying this had a choice of either or, i chose the cheaper 3700+ but now im sure there only 60$. Where is it? I cant even find my own processor, its like it doesn’t even exist.

-Terrance