Wow! That much? As to the % off for used, on the lot with CPO, are you talking about off the Original MSRP Sticker (when new) % off the used asking price?
I think if you are satisfied with a 15% discount, there are lots and lots of cars available to you. Here is how I see it and I having been shopping and watching prices on new orders, new on-the-lot, and used CPOs. I have found reported and advertised discounts to be highly regional. For whatever reason, some dealers appear to be getting more than others for very similar cars. This is particularly interesting because given the prices of these cars, the average buyer is much more likely to be willing to travel to get the right car, which I would have thought, would have reduced the regional factor.Here are the discounts I would be looking for (all for non-GTS vehicles) from sticker for a modestly optioned car(+/- $15k options):For custom ordered 2015: 6% to 9% offFor new, on-the-lot 2015: 8% TO 12% offFor new, on-the-lot 2014: 12% to 16% offFor used, on-the-lot 2014 w/o CPO: 20% to 25% off (depending on mileage)For used, on-the-lot 2014 with CPO: add $2500 to non-CPO discount aboveRight now I am aware of a base CPO Cayman, 10K miles, with a sticker of $68K on a Porsche dealer lot with an asking price of $52K, which is roughly a 24% discount. I could likely be had for close to $50K.