Can you give us the exact details as to how your luthier "reattached the neck"? Method, type of glue, neck angle, shims....et cetera. Done properly, this is a solid repair; done by a 16 year old at an electric guitar shop with a bottle of tightbond and drywall screws....not so good....
Where are you located? The price of old Kays is very region specific.
j. www.condino.com www.kaybassrepair.com
former 16 year old electric guitar shop "luthier"