Yes! Mercadolibre, my bike was a whopping 200 pesos, and no one wants to pull me off of it. There are many people who want to unload used (maybe stolen) bikes!
But my bike was in need of repairs (we minimally had to change the brakes, change the brake wires and eventually), so if you are not equipped or able to do that, I might spend a little more...or on second thought, maybe not because as you probably know in Argentina, spending more doesn't necessarily mean it won't be trucho! You can save your 90 pesos for a bike shop repair!