I have just purchased one of these 50k km rs275 cups. 22k driveaway seemed fair for a 2.5-3 year old 48ish k car.
i am not overly concerned too much about its history and treatment as it has 2 years warranty. Also a rental sold back to Renault it had to meet criteria for repurchase ie, regular servicing and oem parts etc. these cars are made for being driven and until modded should prove reliable. Rental cars are not usually a track driven vehicle so shouldnt have been too badly tormented in retrospect.
my point is that if you get it for a good price you can sell it on with warranty to other potential owners with warranty as a bonus.
this was my purchase.