FWIW, I think that the Ruger 77 RSIs all have 18.5" barrels, but what is 1/2" among friends?

Is it built on a tang safety or a Mark II action?

I don't have a 30-06, but I do have a 270 and don't find anything about it particularly objectionable. I paid $540 for mine NIB a couple of years ago, so $550 without any wear seems like an OK price.

I doubt that you'll get MOA accuracy from many mannlicher stocked rifles, but if you're shooting deer sized game within a couple hundred yards, it probably won't matter.

Jeff