My local guy charges £100 for a full set up.
For that you get the works, action, intonation, truss rod, frets filed and levelled if it needs it.
If you want the strings changed you have to provide him with the new set yourself and he'll adjust the set up for those strings.
I've only ever used his services a couple of times, both times with new (to me) basses that I though could benefit from the full treatment.
Both times I considered it money well spent.