what its body condition?
Has it been repainted?
Does it have any service History?
Any major accident?
what is the condition of bonnet, pillars,penals etc.?
Did you check the smoke, whats its color?
Does the sound of the engine seem good?
How much kilometers it has done?
Have you checked its drive, how is its pick?
the criterion of good condition varies from person to person judging all the aspects.
city 97 without CNG should be around 475 to 500 thousand.