I think dealer stamps can be a bit of a waste of time.... If i was selling my car (which has always gone to a decent specialist) and the buyer was dubious about it having no stamps, i'd tell him the dealers are sh1t and i don't go to them, as i love my car too much etc... If he was into cars he'd undersrans, and thats the sort of person i'd want to sell my car too! Likewise with buying, i'd be more worried about a car that had full VAG history, as i know how much they feck it up (through personal experiece, eg wrong spark plugs

)