If your NFT project is dead and someone is willing to take it over, you should be thanking them, not invoicing them.
They're not buying your business; they're inheriting your mess and trying to give your holders a second chance.
The audacity of charging for a project you already gave up on is mad.
Your holders lost money, your community died, and now you want profit on the way out too?
Hand over the keys and walk away, grateful that someone cared enough to try.