R8 Interested, tips purchase advice

Dear community, After reading a few hundred posts I would say I am already well informed. Nevertheless, I would like to ask you finally if I have chosen my criteria correctly in your opinion and how best to proceed with the purchase of a super sports car (to the next Audi workshop and have it completely checked e.g. what else can you do? – r8 v8 – accident-free – min. 2009 (white FIS, less oil loss) – preferably 1st hand, check booklet – max. 4 0k km – color white my last three cars black (feeling rare, why? Too bad? in an emergency it has to be black again – r-tronik (rugging with super sports cars rather less dramatic) – B&O How important is a checkbook really with such a car? Can one identify heater carts somehow? Did I spontaneously forget something? Should one possibly wait until the end of 2014 because the new model presses on the prices to avoid a slip in the value loss. Even if the value loss w It seems to have already r8 with a few KM-cooked valves, so I plan a few € for a big Bedi cleaning or what do you mean? Next year I will rent the r8 for 2 days because it seems the only way is to test the car intensively, if he doesn’t disappoint me I know exactly what happens to me I hope you can give me some more r8 specific tips. Thanks in the v oraus, your docix