AMD Ryzen 7 3700X CPU with Corsair Air Cooler for about 350$.
Ge-force gtx 1650 GPU for about 140$.
So you'll get it in the range of $ 450 to $ 560.
Unless you offer cheaper shipping costs or a better guarantee, I believe this deal can be found at $ 500 easily.
Can you provide more pictures, your address, cooling, photos of machine specifications?
Good luck