As cheap as they are, get the best condition you can find, and be sure to get the accessories, which is usually holster, cleaning rod, jag, etc., that came with the revolver. Some show dealers like to sell that separately as 'extra'. Leather holsters are uncommon and worth buying the pistol to get the holster.
Look for good finish and markings, Izhevsk armory is a triangle with a 'I' in it's center, Tula armory is a Star. Earlier production may have CCCP, RFSR, or Czarist markings, and are sought after. WWII production years are common.
These are cheap enough you can pick up a dozen, in a year, for less than a grand, and fun to collect and shoot.