I understand there will be some skepticism but I assure you that I've taken the necessary precautions to ensure the privacy of these keys.
The first step is to never share your private keys with anybody else.
Whoever buys these has already violated that very first step, because they shared the keys with you.
Whether or not we trust you have deleted the keys on your end is irrelevant, the idea is not having to trust anybody.
I get you want to make some of the money you spent on creating those keys back, but this sounds like a terrible idea.
Everyone starts from somewhere on physical collectibles. Cas, lealanas ect. Your basically saying I don't have permission to do things like this, pre pointing out skeptical tendencies and addressing them ahead of time means I don't want to further debate this
period. I do appreciate your concern but I'm pretty sure everyone here doesn't need you stating the obvious.