I'd be very wary, the last dodgy one that was on was a similar modus operandi. It was advertised on Bournemouth Gumtree and ended up being in the Scottish Isles. The guy never once spoke to me about the Bass, just how he wanted payment. When I suggested someone looking at it, he got very jumpy. He had an eastern european name which may/may not have been genuine.
I was never interested in the Bass, just how the scam would work, The photos were the same ones from a previous scam according to those who know these things.