Well, I don't know anything about Safari Arms specifically, but excellent 1911s can be had in that price range. Taurus makes the PT1911 which has excellent fit and finish ($550 maybe), and Rock Island Armory makes a variety of 1911s which are excellent guns (I have two: a GI and the "Tactical" model; the Tactical cost me $420).
Now, once again, I know basically nothing about Safari Arms, so I can't speak one way or the other as far as this specific gun goes.
My point is just that, excellent 1911s can be had in the price range.
Find a few guides like this and read them before buying any used pistol: