Swappers,this is what I do,right or wrong.What you have got to do is weigh up the type of punter.If you sense they could be hard work,hit them with a price.Sometimes it can be a good idea to find out if they have had any offers from main dealers.If they have,you know you have a chance as some amateur in a crimplene blazer has probably undervalued.With nice punters who might have a cheapie,I always tell them how good it is “ the sum of the parts are worth more than the car” etc.They then uasually tell you how much they want.However,you must be carefull with ‘middle of the road ‘ swappers e.g. yours is £6k and the swapper is £3500,these are the ones you can get stuck with.....I had never heard the term ‘retail back’ before,but we have been doing that for years......At the end of the day,it has always been a great feeling to do a deal and get a good swapper in ‘right’.