Hello, I'm selling this nice Rx 6600 from Powercolor it has 8 GB of GDDR6. The card was tested in the benchmarks, and it is working fine.

The card was used in mining, and the heatsink shows some oxidation. The PCB is in good condition. It was checked for oxidised components, and none were found. 
The thermal pads and thermal compound were replaced.
If you have any questions, please ask!