I imagine the payout came from a house insurance claim and so the DVLA nor anyone else has been informed that the truck is damaged at all , its a ghost it exists on paper alone .
The seller is probably not breaking any laws and he knows a guy that knows a guy that can make this profitable . It's an ad to attract criminals and its 8 grand because he doesn't want some numpty asking if the badge on the back is still good .
Like it or not an mot can be bought if you know the right people , and the seller of the stolen car doesn't give a damn if it gets crushed at its next valid mot .
What makes my blood boil is in these cases the buyer remains the victim even if the crooks are caught . On that police xfactor tv bull recently i watched police confiscate an Ifor Williams trailer worth about 2 grand . The guy had all the paperwork and genuine proof of purchase (ebay) and was found to be completely innocent of any wrongdoing . For his 2 grand all he got was advice from the police to save up and buy another preferably direct from Ifor next time .