Buying GPU in bulk

Hi guys ,
I am interested in ordering 500-1000 pieces of following models. Quantity depends on price.
AMD RX 480 8GB
AMD RX 580 8gb
GTX 1070
IF anyone knows please direct me somewhere because wherever i tried so far was a dead end.

Contact the manufacturer, even they might impose some restriction. Here in norway retailers allow up to 2 gpus per households. It might not be possible these days!