Note: the intention of this comment is just to be informative.
I did a quick search in my country's Mercado Libre (the local Amazon, we could say) and the cheapest available one, Fnirsi-138 Pro [1] goes for a price of aprox. 50 USD [2]
[1] https://www.amazon.com/Digital-Oscilloscope-Portable-Samplin...
https://www.mercadolibre.com.ar/osciloscopio-digital-fnirsi-...