Take this for what its worth, I have never owned one and dont know much about them. However, three times I can remember seeing them was when their owners were haveing some SERIOUS problems. I didnt see the first one, but the guy said his slide flew down range. I dont know how it did it, but sure enough, the slide was down range. The second was the gun was completely siezed up, nothing would move, dont know what it was but SGB was there for this one, I think he helped the guys get it straightened out. The thrid was a guy who contantly had feeding problems with a variety of ammo. The gun could not make it through a magazine.
I admit up front to be jaded from these second hand experiences, but I wouldnt pay $3 for any of those kind of headaches, much less $300. YMMV...