It's interesting there have been so few for sale and now several over a couple of weeks. To me this new outfit not quite as desirable as some because that's a very old Evinrude (pre exhaust through hub). They often only fetch £350 so you're sort of buying a £1000 380... which might be OK in itself depending on age.
I see the Yamaha 15 has sold already from that other ad where the guy had the £1500 380 and £1350 Yamaha listed separately. 380 still there for £1500.
I messaged the one with the old Mercury and precautionary patches to see the boat age but guy never responded.