1. I could keep them and continue using them as I have been as forwarding domains to a website with actual content.
2. I could just delete/not renew them.
3. Or I could renew them and attempt to put them up for sale .
Can’t think of a fourth option in this case. But here are the domain names all of them are .coms
Your Tablet Store
All forward to a website where I sell tablet PCs and smart phones.