All my rifles have been second hand but that says more about me than the rifles . If t'were I, I would be holding out for a Tikka m595 as these are cracking rifles, some would say better than some of Sako's recent offerings (takes cover), and you can always get a bore scope down it if purchasing from an RFD. Saying that, I wouldn't say no to a new T3 so maybe you should have a look and see what's about, weigh up the differences and whether you want a guarantee etc.
First choice - used m595
Second choice - used T3
My opinion of course but there are a lot of 'used' rifles out there