sorry but anyone dealing in specialist/classiic cars....for an outlay of 6k a 2 k margin doesnt seem unreasonable to me...bear in mind this is a very specialist market...and it being an old rs and the ammount of dickheads the bloke wil have to speak to with ...i would be looking for a margin of around 6k on something like this to allow for the dick head/annoyance factor!
not to mention the time things like this will be in stock before finding a buyer!

he must have the patience of a saint