That's a lot of money for that gun IMO. I'd consider 100 less. I had a .280 in the same gun you're looking at. It was a nice rifle.
I'm not the norm here, but I like the mag.s for them.
Mine shot like you'd expect for a thin whippy bbl. I got 1 1/4" at 100 with Fed blue box 140 gr, and 2" with Core lokt 150 grain.