I like Kahr. I've owned a couple..I have a PM45 now that I carry daily because it's smaller than my 1911's and I like the DAO Trigger. I found a CW9 for sale for $250. I'm thinking about...
I can also vouch for the Kahr P40. It never hiccup' with factory ammo....ball or just.
As a side note, I tried to load some low recoil 40 and that it did have trouble with.....but small pistols rarely take loads at the extreme's of the loading spectrum.
I have a k40 mk40 and pm40! All my Kahr have been perfect in reliability. The prices of the 40 cal pistols have really been taking a dive! I paid 430.00 for a brand new not blemish mk40 from buds a few months ago. And 450.00 for brand new black pm40. They both came with 3 mags. I would think 350-400 would be decent price for used k40! By the way the k40 is by far my favorite Kahr! And I have quite a few. It has the best trigger of all of them.