Hey, I'm in Brasil too, and since the PSU in my old build died taking with it everything but the SSD and HDDs I'm pricing new parts on MercadoLivre right now.
So far I've got:
PSU: Corsair RM750x R$ 849,65
MB: Gigabyte Aorus Z390 Elite R$ 1319,90
RAM: Gskill RipJaws V 2x8GB DDR4 3000 (F4-3000C15D-16GVKB) R$ 679
CPU: Intel i5 9600k R$ 1599
Cooler: Deepcool Gammaxx 400 R$ 148,04
VGA: Gigabyte WindForce OC RTX 2060 R$ 2099,90
All these parts are available in 12 monthly instalments, interest free, on credit-card.
If this seems too expensive for you drop me a word telling how many Bolsonaros you've got and I'll adjust the build for you accordingly.