You can get a 1060 with 3gb and 1152 Cuda cores on NewEgg for $229.

I don't know if linking directly to a store like NewEgg is against TOS or not, so I'll simply post the text. You can copy and past it to your browser to check it out. You might find other cards for around the same money, but again be sure to compare cuda cores and vram to get the best bang for the buck.

https://www.newegg.com/Product/Product.aspx?Item=N82E16814487284&cm_re=graphics_card--14-487-284--Product

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