I have a pc9 which I found in a local gun store and purchased for $400. it has a long tigger pull which is easy to get used to. I found it to be accurate at my typical ranges of 50yd and 100yd and it operates with no hickups using budget 9mm ammo.
It is very heavy for it's size, but you get a very solid platform with a heavy barrel and solid feel for that weight penalty. Keep in mind, it was designed with law enforcment as it's intended users.
It also uses standard and high capacity mags so depending on where you live, you can have up to 30 rounders which should be enough ammo to cover you butt in just about any close quarters type need that may arise.
There are not many options and accessories available for this rifle but for a fun plinker, and great SHTF grab and go rifle, I thnk it is a great option. True they are no longer made, but they are not that tough to locate if you really want one. Gunbroker has then listed time to time too.
Here is mine: