My main bass (a Brawley 5 string) was £450 s/h. I can't justify anything more as the bass is much better than I am, or probably will ever be, and I only play at home or in church.
However there is an Ovation Magnum 1 on Reverb at around £2,600 that I really would like to own, but don't need. So to me that's an expensive bass.
Those who gig regularly will have different criteria, and it's been interesting reading the views here.