I was looking through our forums this morning and saw a link to a Venice core Athlon 64 3500+ processor, priced at $272 as of this posting.  Get ’em while they’re hot!
Specifications
Model Brand AMD
Series Athlon 64
Model ADA3500DAA4BP
CPU Socket Type Socket 939
Tech Spec Core Venice
Name Athlon 64 3500+
Operating Frequency 2.2GHz
FSB 1GHz
L1 Cache 64KB+64KB
L2 Cache 512KB
Process 90 nm
Hyper-Transport Support Yes
Multimedia Instruction MMX, SSE, SSE2, 3DNOW! Professional
Voltage 1.5V