They're rare as hens' teeth...
And shoot like a house on fire.
A friend had one as his across-the-course match rifle, in .308. It was a bargain at the time, but I had a serious jones going for a Remington 700 PSS in the same chambering. That Tikka 595 Master Sporter shot just as well as, if not better, than my 700 PSS.
Then they stopped making them, and the importation thereof dried up. Every now and again you'll find one for sale, and I kick myself for not grabbing one way back when.
There's also a 695 Master Sporter in 6.5x55 that would be a kick in the pants.
Regardless of the chambering, if you have a line on one for a reasonable price, grab it!