All 629s are stainless. The blued version is the "29" and all 29s and 629s are .44Mag. The other aspects of the revolver are dependent on barrel length, internal lock/no internal lock, grips, finish quality, series (inside the yoke is the model number i.e, 629-? this will tell you what engineering build it is. If it has no internal lock, and isn't loose as hell, then it's worth that price. I've never looked at one that was under $450, so keep that in mind. The N-frame (which this one is) is always a nice gun to shoot. I have three, and love them!
Best,
Steve
(TXSWFAN posted before I got my shot off. Quick on the draw!)