I found a Gigabyte motherboard for athlon 64 processor, only 127.00+ free shipping!!!

perfomance to money wise, it might be more usefull to get 2 AthlonXp2800. there currently $136.00... Plus a refurbished motherboard for $41.00! Or a NEW one for:$53.00 free shipping.(refubished:Biostar Motherboard for AMD Athlon/AthlonXP/Duron processors , Model# M7NCD PRO, NEW:BIOSTAR M7VKQ PRO MICRO ATX SiS 740 - RETAIL)
The total would be cheaper, plus PROBALLY would be getting more perfomance for your mony.