Stay away from eBay for this - their costs are excessive.
Try if at all possible to sell it locally: You apparently live in Devon, a county full of retiree woodworkers. And it does look like a nice bench. I would try Gumtree or local small ads,
at a sensible price (in the 300-350 area, as mentioned above). Be prepared to negotiate, but put as much practical info in the ad:
- is it home made or manufactured,
- what wood(s) is it,
- dimensions, and,
- if it dismantles (or looks like it does).
Also details of the vice that's fitted. If you don't want to sell the vice separately, don't - otherwise the bench will be harder to sell on its own, and I doubt you will want to dispose of it.
Also have a look for local woodworking/woodturning clubs, or anything similar. You might find a buyer there, but if they have a clubhouse, you might donate it as a last resort. Were it my dad's stuff, I'd like it to be appreciatively used...
Regards, E.