I see -- you were just commenting on the feed ramp issue as it MIGHT pertain to other problems people have experienced with the guns.
A stovepipe to me means the cartridge or case, empty or loaded, ends up being jammed upward in the action when it tried to go back into battery. There may be another technical term for this with a loaded cartridge of which I am not aware.
The term doesn't apply to loaded cartridges sticking up... as the term STOVEPIPE comes from seeing an empty case sticking up like a stovepipe.
It's generally caused by the extractor losing its grip on the case and it interfering with the next round being chambered. There's always a new round and an old round competing for space. Extractor issues were common with the early PF-9, particularly if the screw holding the extractor in place was loose or damaged.
If you have a unfired round sticking up that round hasn't made it to the chamber, THAT is generally a mag-related issue, often feed lips a bit too wide. You don't have two cases competing for the same space. (As you hinted, it might also be a feed-ramp related problem, but that would be less common.)
A nosedive to me means the cartridge got jammed in the magazine well pointing downward --usually jammed up against the edge of the feed ramp.
Yes. And it's often due to a weak mag spring, or the mag spring having been installed wrong, so that the tip of the spring isn't supporting the FRONT of the follower. The follower generally isn't lifting it high enough, and when the slide catches the round and pushes it forward, it can't go where it needs to go.
I will not sell it because it is a primarily self-defense gun and I wouldn't want some poor schnook to find out how unreliable it is in an actual defense situation. I have frequently described it as a two-shot derringer with a handy detachable compartment for extra cartridges.
If you're unwilling to invest more time in the gun, I would definitely sell it -- with proper warnings/caveats -- on a forum where people are familiar with the gun. Even selling it at a discount beats using it as a paper weight. A couple of good forum where you could do this with a clear conscience are shown below.
Or, you might spend some time on a couple of these Kel-Tec-focused Forums, where MANY folks know the guns and their problems well -- and can supply the proper fixes. You may find some interesting enhancements, too. Try these:
http://www.thektog.org/forum/
http://www.keltecforum.com/
http://ktog.org/tecwerks.htm (This one may have become inactive, but it's still up and the tips are still good...)
.