I've bought from pawnshops before, just go into a deal with both eyes open.
I guess you need to ask yourself if that caliber is what you want, and you can afford to shoot it. Good for hunting, but a bit pricey to shoot paper. A bit hard on the shoulder too if you shoot it a lot.
Not a bad price, depending on condition. You might haggle some though, this time of year with hunting season over, most hunting rifles will sit until close to next season. You might point that out to the shop, if you get serious.
Inspect it with an eye to any unusual wear, turn the bolt in. It should rotate freely with no binding spots. Remove the bolt and look at the face, where the end of the bullet rests against it. Does it have a lot of brass color/residue, or does it look reasonably new.
Get a light to look down the bore with. If you shine it onto a slip of white paper placed in the chamber area, it will light up the bore with less glare. Shouldn't be any rust or pitting. Inspect the muzzle area right where the rifling ends at the very edge of the bore, this is the crown, it should be uniform with no nicks or dings all the way around the inside edge. See if the shop will let you dry fire it at least once. Trigger pull should be smooth with no binding until it breaks. The pull weight can be adjusted if you think it is too much. Check the scope mount holes and make sure the threads are not boogered up.
As far as wood and cosmetics, scratches, dings on the outside. That's your call.
