Just thought...Maybe he's got a mate down the pub who knows a bit about Dukes but is a bit hard of hearing. You can imagine the conversation.
:"I'm going to sell the ST4"
:"Y'what? Pardon...speak up lad"
"I SAID, I'M SELLING THE ST4 WHAT DO YOU THINK IT'S WORTH?"
:"Bloody 'ell, an
SP4? Very rare they are lad, worth a bloody fortune I shouldn't wonder"
: "Bloody brilliant...I'll stick it on eBay then"