How exciting that is is finally going home with you, he is so adorable. Hope to see lots more of him once he settles in at home. Don't be surprised if he seems a bit less tame at home, it is just because he is nervous in the new place.
Picture of him with his siblings. My baby boy is in the middle. One of the chicks was so cute when the lady was grabbing my baby this chick was going crazy biting at her thinking she was feeding it was soooooo adorable. My baby was trying to feed this chick or soothe it it was cute!
How old is your little fellow? Are you certain that he is fully and completely weaned?
It is always best that budgies not be released from it's parent and siblings until they reach at least 8 weeks old.