You mentioned no stacked address means you can't provide a signed message? If yes, then I don't think you will find any buyers because it is quite risky for buyers. If someone comes forward to buy an account without signed message, then they won't pay you a lot. So state clearly whether you can provide a signed message or not.
no staked address available.
You want to say that in none of your posts you never used your address ? You know that it can be checked if address is not quoted on bctalkaccountpricer ?
I think bitmixer signature campaign is closed for new users and they are very strict for new user enrollment.
How many posts it has?
It's not, you can still join pretty easily.
No address was staked on the account.