The problems associated with a car manufactured >6 months back are
1) battery quality deteriorate s due to noncharging in time , please find out manufacturing date. better to replace it at the time of delivery.
2) rubber and plastic life and quality deteriorates and becomes unpredictable, The most important is rubbers are tyres.
Tyre quality becomes unpredictable due long disuse, it gets hardened , leading to bouncy ride, leading to underinflation by user, leading to reduced fuel economy.
Such tyres are also prone to sidewall cuts due to hardening , leading to untimely change of that one pirticular tyre, leading to balancing issues, as remaing tyres are hard and old, the cycle continues.
Please find out manufacturing date of tyres of the car.
Door , boot , window , bonnet , plastic and rubber beadings get hardened ,may lead to
water leakages in monsoon, do not rely upon post carwash scenario. Also important are engine rubber foundations.
All kind of oils needs to be replaced.
Also resale value will suffer by 5 to 10 percent.
You will have to cleaverly find out wheather the car was used as a TD car,
please , take into consideration, the above mentioned parts , while calculating the discount.