I was thinking about trying to sell one of my wallets, but now I'm wondering how it is possible... sure one can use escrow to sell the key, but you will still have the seed and with that seed won't you still have access even after selling the the key and seed???
I'm curious because if it is possible I'd be interested in selling one of my wallets with ~14000 LISK in it before the release (let me know in PM if you are interested and know a safe way).
You can use the devs as escrow. A lot of people still dont generate the keys so you can send a PM asking for devs to change your keys to new ones for a third person.