I am looking at a used Taurus model 441.  It is in very good condition, looks new.  I noticed some moment or play in the cylinder, it is the same when the gun is cocked.  Is this normal or bad?  If it is normal how much is to much?

I'm sure there's a way to measure it but I don't know what it is.  I've noticed that nearly all revolvers have a touch of play, enough that you can feel it move.  You don't want it to move very much though, for obvious reasons.  Sorry I can't be of more help.

Depends on what kind of "play".
If you mean the cylinder can be rotated slightly from side to side, this is normal for all revolvers, as long as it isn't a symptom of a worn or battered locking bolt or cylinder locking notches.

About the only revolvers that lock up tightly at the moment of firing are the old Colt revolvers like the Python.  All other revolvers MUST have some rotational play to allow the cylinder to properly align with the barrel.

If the cylinder has "end shake", that is, fore and aft movement, this is a symptom of problems.

So, unless the revolver shows battering or other damage to the cylinder lock notches, or the rotation seems excessive when compared to another Taurus, you're probably Ok.

If the revolver cylinder can be moved back and forth, you have problems that need to be addressed by a gunsmith.