AMD FX-8120 8 core CPU $159
Asus M5A97 Motherboard $89
Corsair Vengence 4x 4GB kit CMZ16GX3M4A1600C9B $89
Total $337, re-use chassis,
(prices from amazon.com)
Now from superbiiz I found proper parts.
Supermicro X9SCM $162.99
Intel Xeon E3-1230 Quad Core $219.99
Super Talent 4 GB Memory $25.99 x 2 (for 8GB) $51.98
Total $434.96 reuse powersupply, chassis and HDD.
So really you could get a good setup if you save up an extra $34
I don't know how much this would cost in Argentina. Superbiiz used to ship internationally but they only do that for business customers that have account managers.
Hmm, customs will hold an order like that, and in the worse scenario I'll have to pay 50% of the total order cost. Yes, Argentina sucks.
Supermicro MBs are not available in Argentina, you can find only 3 on the most used buy&sell site and they're overpriced.
To check Argentina's prices you can use www.mercadolibre.com.ar, all of them are in ARS so USD price will be ARS / 4,6.
An AMD FX-8120 is priced around ARS1200 (USD 260).
An Intel Xeon E3-1235 is priced around ARS1610 (USD 350).