The problem was that

> BitLocker essentially trusts self-encrypted drives to do their job, and defaults to the drive”s hardware encryption.

But that was 2018; the result was that in 2019 https://support.microsoft.com/en-us/topic/september-24-2019-... happened:

> Changes the default setting for BitLocker when encrypting a self-encrypting hard drive. Now, the default is to use software encryption for newly encrypted drives. For existing drives, the type of encryption will not change.

And in any event, I would tend to argue that the matter of reselling is secondary: The problem is that the affected disks are effectively unencrypted, and that's a problem regardless. If your disks are properly encrypted, then reselling them should be safe.