If you can still find one in the $400-600 range, snag it!
Otherwise, what do you want to know?
Polish are probably the best deal going, if you can still find a deal on one. The M70AB2 Yugo is nice but heavier and since most came in via Century, you need to check for canted sights or gas tubes.
Romanians aren't as common as their full-stock brethren, but basically they're still the same rifle.
Russian and Chinese are harder to find and usually demand a higher price.