Just a quick update: the gentleman, perfectly within his rights, declined to budge one inch on his £350 asking price second-hand four year old virtually unused Twinmaster Top.

I am yet to hear back about stock from the company allegedly selling new for 380 and I am desperate to get on with this weapon so have agreed to pay the full amount going on feedback from you good folk. It's firing a 7.8125 grain pellet at 420m/s. It may need tuning up and I believe there is a chap in Yorkshire who provides this service if necessary.

Thanks again for your help everyone

Mark