I just picked one up. Great shooter. The grip is a little hard to get used to, but once you do, it's pretty accurate.
I'm going to change out the grips for more comforatable shooting. Look here for custom grips: Home Page Parts here: Buymilsurp.com, Your source for military surplus. Info on it: Makarov.com. Concealable nylon holster: Soft Armor (#4-CS).
There are more places, but these are a good start.
And remember, most ammo is corrosive, so the barrel has to be cleaned after shooting.