You can try to sell your car at such prices and see if you actually can sell it. If so, I would definitely sell and buy a new car since the new 75 is vastly superior.
This is therefore a dilemma. If the new 75 is vastly superior, why would I, or any other logical person, spend a lot to buy a used car that's significantly inferior, for not much less than a new car?
Honestly I personally wouldn't buy a used 60, even one just delivered right before it went away, with 2k miles and fully optioned, for anything more than $55k, because I personally think the new car is so much more superior.