if you like the Walther PPK, I suggest getting one, its a very nice gun, and high quality also.
and, if you like that after you shoot it, I really suggest looking at getting a Makarov.
the makarov shoots 9x18, which is basically a russian 380.
I pshawd the maks for a long time, but when i shot one, I loved it.
plus the gun is fairly cheap, and the ammo is very cheap for surplus 9x18.
further, the Makarov is based on the Walther PP model, another thing the Russkis stole, then redid in a bit of a cruder model:-)
to show the difference here, below is a surplus German Walther PP(not PPK) that was supposed to be German customs issue, mine is in the original caliber of 32ACP, and has a hard chromed frame, and blued slide, and the police lanyard ring:
below is a bulgarian makarov, virtually the same gun, aside from a little bulkier and it has a heel clip magazine release. these guns go from $125 to $175 depending on condition.
if you can, buy both:-)