O.A. started going out of business in 2017 and didn't finally shut down until around March, 2020, so it was a glide path down. As a result, I think that there was not really much left for any person or vendor to stockpile. Odds and ends show up on GunBroker, but usually as a single items, not "X (where X > 1) Available" sales.
MHO, YMMV, etc.