What is the best buy for Santro 2006 model sparingly used done 20000km lady driven

You have not given what variant is it.. then only we can give you real estimate, and if it has really done only 20K Km on odometer then you are going to have real nice deal as its now almost 9 years old but yet very new. However, was this lady taking services in time ?

Limited edition,yes the services are on time,what is the mileage expected

Thats a good deal if you can buy it upto Rs. 130000-140000 . Lesser is better.