For Sale:
Used AsRock Radeon VII. Bought new from Newegg and had it under water with an EK waterblock until I replaced it with a 6800.
Put the original cooler back on with new ThermalGrizzly thermal pad. Runs great.
$425.00 plus $20.00 shipping to Continental US.
Paypal preferred
I think you will be VERY lucky to snag a 5800x3D for $499. The way this market is going I could see it set at a MSRP of $599. Then the scalpers move in.