Pizzaguy is correct. It depends on what you want.

Back in April 2010, I wanted a low mileage SRT6 and found a 917 mile one. Yes, 917 and the price was high for a coupe at $19,655. Three and half years later and just under 21k on the car, it will never bring close to that number, but most cars never get back what you paid for them.
Mine is worth about $13 or so---but divide the loss by the time and you get $150 per month cost for me to own an all-but-new at the time AMG derived car.
Not a bad deal when all is said in done.

I wanted a car which I knew was not raced and beaten, so I hunted this car down for 6 months and was willing to pay the price. When I found mine, I talked to the owner and he said all the right things about starting it weekly and getting it to temperature; driving it for at least 5 miles a month and changing the fluids by time instead of mileage.

Being over 3 and half years later---The $18k price is still a little high in my opinion, but with fewer under 10k miles cars are out there, it may not be.
With only 2016 coupes made, there can not be but a hand full under 10k for sale. The number must be getting lower and not higher, so it is a personal call.

Now, not all SRT6 are run to death, but owners do not talk about the "permagrin" for nothing. The good news is these cars can handle some running and some miles---I have seen several in the 130k plus miles range, but at the time, I was not sure that I wanted to take any chances. Today, miles would not be the same concern.

I suggest that you have the car checked out---Used this forum to get leads on what to watch out for.

Even with the low miles, pay someone to check out the car if you can not or not sure of blown cars.
If you are paying top dollar---get a top car---without any questions.
I am sure someone on here is close by and would help you if you need it, but check it out.
A car that has been hit---even a small accident, is worth less, and these cars do not like accidents. They total out easily.

Do a LONG test drive, get the car good a hot; make sure the IC pump does not cut in and out; start it hot and cold several times; check the date on the battery anything over 4 years is done---this car does NOT like low voltage, and check for paint work.

Good luck, Jimmy