An AK74 is far from what I'd consider "accurate", but you're right, we all have our own definition. Regardless, the AK will cost in excess of $600 in todays market, and while 5.45 is currently the cheapest milsurp ammo out there, what happens if the door is closed to future imports? Our local boys don't make it.
Regardless, an AK or 3-4, in the collection is always a good thing. But if accuracy is of concern to you, there are plenty of other rifles out there that I would recommend over an AK