I have been Looking at a lot of 9mm's lately, searching for a small gun yet one that I can hold comfortably in my large hands. Yesterday I came across a used K9 at the LGS. Looks to be in excellent condition with almost no external wear on it. Fit my hand great. The salesman knew nothing about them, told me they were no longer made. At $550 I thought it was on the high side but when I did a little internet browsing maybe it's not, as a quick check of Gunbroker indicated it was about in line. I liked the trigger, grips etc and would like to seriously consider this gun. Not sure what kind of warranty the gun store offers on a used gun. Is this gun considered to have good reliability? Anything special I should look for in a used gun? I realize I could probably buy a new one with a polymer frame for the same price but I did like the feel of this one.