I've got a bunch of guns I have either never fired, or have only fired a few rounds through. That's not to say they have never been fired before, in most cases, I don't know if they have or not. They are shall we say in very nice condition.
Does that mean I won't fire them? I don't know. I might. I might not. For example, I just bought a 2" S&W, M&P from the mid 50's, in the box, with most of the papers and stuff. I have no idea if it's ever been fired or not, but it shows no evidence of having been. There are slight burn rings on three of the cylinders, the other three are clean. There is no mark on the recoil shield. There is a VERY slight turn ring. You get the picture.
I haven't fired it yet. I don't really need to. I've got other M&P/Model 10's to shoot, and I've got a couple other "snubbies" so I know basically how it would shoot. Why "mess it up?" I know realistically, since I can't document that it's never been fired, I can't really say it, and I know that shooting it a few rounds won't really hurt it in that case, but I don't think I will. I just don't rule it out.