First, I've reduced the collection/meet-up price to £750. I live in south-west London, but I'm travelling to Oxford this Saturday, and to mid-Wales in a few weeks.
Second, I'll now post this within the UK, at cost (£20) - but I'm only comfortable doing this if it's in a hard case. Unfortunately I don't have a hard case to hand, so I would ask the buyer to either send me one or I can arrange the purchase of a new one (at the buyer's expense).
The cheapest hard case I could find is: https://www.gear4music.com/Guitar-and-Bass/Electric-Bass-Guitar-Case-by-Gear4music/800 , which is £50 including postage. Or I can purchase any alternative hard case of your choice.
Finally, since it'll now be in a hard case, if you don't want the included gig bag, subtract £20. It's this one: https://www.public-peace.de/accessories/gigbags-suitcases/bass-gigbags/electric-bass/956-gigbag-standard
So in summary:
collection/meet-up: £750
delivered (you send me a hard case first): £770 with gig bag, or £750 without
delivered in a new Gear4music hard case: £820 with gig bag, or £800 without