True. Some experts here.
You face a couple of choices here. You can try and achieve the highest price, which would require having detailed information on dimensions, strings, string height, structural condition, breaks, splits, damage and more. Or you could price it at a level where someone is happy to take a punt on it. The location of the bass is, unfortunately, against you.
If it's been unplayed for 8 years and stored somewhere I'd say it'll need a complete overhaul in any case, which is never cheap and (in some cases) can be so costly it's terminal for the bass.
Don't want to be negative and I'd help if I could but I have no idea of the used market, values and so on.
Where are they in South Wales?