I own two Kahr products (CW40 & P380) and both work flawless for me.
My CW40 was finicky for the first 50 rounds that ran through it, but after the suggested "break-in" period, I have not had any malfunctions. My P380 has worked flawless since the beginning.
The Kahr users I know all went to the brand for some simple reasons:
compactness,reliable,ease of use & durability. When it comes to a compact 9mm, .40, .45, it's hard to beat a Kahr firearm. The ease of use is simple: they are all DAO (Double-Action only). All the Kahrs I've seen have worked flawlessly, for me and other owners.
380 bucks for a used 9mm Kahr seems like a good buy in my book.
You could always ask the seller if they are able to come down on the price
for even more of a savings on your part.