CZ-52 is probably your cheapest option since your whole purpose in buying is for cheap shooting. Some of the non-Russian Tokarevs aren't a whole lot more though. I gave $130ish for my CZ-52 a few years ago.
surplus TT and TTC models sell for aobut 200$. thats what i bought. there is commercially made 30 mauser which can be used in a firearm chambered in 7.62 tok. the tok is higher pressure than the mauser so you cant use tok ammo in a mauser firearm, but you can use mauser ammo in a tok firearm.
IIRC, the CZ-52 is notorious for firing pin failure (breakage) and grip panels cracking. I believe forged firing pins are sold in Shotgun News, so it's NBD to get replacements. That said, I believe this is an otherwise excellent, well made handgun. Ive been wanting one for years, and I better get one before they all dry up!