Online retailers have been trying to enforce special policies to prevent crypto miners and scalpers from wiping out GPU stocks in not time. GPUs are now usually bundled along CPUs, motherboards or SSDs, but crypto miners are obviously not interested in any of these, so they are expected to dump all non-GPU components at low prices on Ebay.
https://www.notebookcheck.net/Crypto-miners-could-soon-flood-Ebay-with-cheap-CPUs-motherboards-and-SSDs-acquired-via-GPU-bundle-purchases.539289.0.html