Case-Mod.com has deals currently on these popular heatsinks:
Thermalright SLK-800A - Socket A $29.99
Thermalright SLK-900U - Universal $39.99
Thermalright SK-7 Copper Heatsink - Socket A $19.99
Thermalright AX-7 - Socket A $14.99
(full listing here)
Never tried them but from the link on their site they have a great Reseller Rating.
Enjoy!
-manicm
Thermalright SLK-800A - Socket A $29.99
Thermalright SLK-900U - Universal $39.99
Thermalright SK-7 Copper Heatsink - Socket A $19.99
Thermalright AX-7 - Socket A $14.99
(full listing here)
Never tried them but from the link on their site they have a great Reseller Rating.
Enjoy!
-manicm