The 6800 in particular should be relatively rare because AMD shouldn't have needed to cut many that far in the first place.
Back during the RDNA days. the RX5700 was as low as $292. The RX5700xt was $340. People can argue AMD didn't have any top of the line GPU's. You can still argue that point because Nvidia outperforms them at the top level GPU currently.
I will argue that both AMD and Nvidia colluded with a 3rd party known as cryptocurrency interests who encouraged both to restrict supply. AMD had a high level executive taking bets on the availability of AMD GPU's. Insisting that AMD would have no trouble being able to meet market demands for their GPU's.
Nvidia said supply of GPU's would be an issue. Problem is Nvidia had far more supply than AMD. It was AMD which said they would have no supply issues with regards to their entire line of GPU's.
Remember back in the early release of the 3000 series GPU's. They found a shipping container full of tens of thousands Nvidia GPU's that was lost in transit. It's funny how things get lost and found when something turns into a valuable asset. This discovery kind of backfired on Nvidia and the idea that they were not able to produce enough GPU's to meet demand. As long as we can all agree that scarcity is a manufactured process. In other words if supply is sufficient, you have to restrict supply to achieve scarcity. This leads to increased demand.
My point is that crypto ran it's course and like all things, it crashed and burned. Now both AMD and Nvidia are left with excessive supplies and TSMC would not let Nvidia out of their contract. Nvidia would lose a few billion or they would have to fulfill their silicon order of GPU's. Nvidia had Samsung making their silicon and memory modules. Then they hedged their bets with TSMC.