I'd say about £500 tops due to the fact it's left hand drive and it's a weird looking mk2 Sierra but with 2 doors and a hatch.

I've got one - people really don't like them much as a mk2 - If it was a mk1 however.... you'd be able to sell fairly easily.

You can convert to RHD but expensive unless you can weld and are handy with spanners etc.

Good luck.