Gariyoun ki qeematoun ko to waisay hi aag lag gae hai... In 2004, brand new VXR was for 491,000/- The guy who is selling it for 390K after 7 years is really high. OK! New car prices have gone up. But what's the deal with a 7 year old car? And trust me, its a Suzuki VXR. If the mileage is above 100K or 125K, then most probably it wont be fit mechanically until and unless its a piece!
By the way the car you are talking about is VX as it doesn't have an A/C. Its bumpers should be black.
When you go to check the car, do check its A/C blower. Normally they become weak or they remain at only one position. Also check whether the heater is working or not. Usually the heater stops working after a couple of years. Do check the body seals under the hood where the front shocks are attached. Alto is a weak car. If you get a chance to drive, do notice if you hear any "tak tak" sound from the steering when you go over small bumps. Its steering is a mess.
These are some of the common problems that you may see in an Alto.