Bottom line is if you want an LS it is worth paying a little extra for a mint low miles car.
I once bought a Mercedes 300ce 10 years old with 10000 dry miles. I paid over the odds from a Mercedes dealer, but the car had been serviced every 1000 miles and wasn't even run in. That car new in 1992 cost £42,000 and I paid £15000 for it 10 years later.
But boy did I enjoy driving it. It never had any repairs other than routine servicing