7 month old Derbyan parrot

I’m looking to sale my derbyan parrot. He’s only 7 months old. Not tame. Still very on edge. I don’t really have much experience in this parrot & im struggling to get him to like me. I don’t really have the time to tame him. We’ve had him a few months now & there’s been no progress. He will make noises at my other birds & he’s not bothered when they fly onto his cage. He will come out his cage but still doesn’t like to come close to you. I think he needs more time & more space. He’s a beautiful bird. His beak is slowly starting to change from black to orange now 🙂 he doesn’t come with his cage unfortunately, so buyer will need their own. Any questions just ask.