As the title says, a while ago I sent a guarantee for 2 RX460, they gave me a credit note for one, so I will increase the price to buy an RX570, but the cheapest one is MSI, which has better performance, I am mining because I have the price of cheap light.
MSI Armor or Gaming? Gaming better.
Gigabyte Gaming or AORUS?
In any case, the profit will depend on the manufacturer of memory and modify of the card.
What kind of coin are you going to mining?