Buying a used iMT isn’t much of a worry if the car was well-maintained. In fact, it would be simpler and cheaper to fix than a dual clutch auto, gearboxes which have given some trouble across different brands.
Buy from a reputed reseller like Spinny, as you will get a car that is thoroughly inspected and, depending on the individual model, would have a warranty too. Prices could be higher than market rates, but that does get offset by the peace of mind in terms of a car that is serviced and backed by a brand.
Expected to pay around Rs 7 to 8 lakh for a two-year-old car, again, the value will vary a lot depending on where you buy it and the condition and mileage of the car. As for the safety angle, yes, the car has an average safety score, and this is ok for primarily city usage.
If you do a lot of highway drives and are very concerned about safety you could look at a Tata Altroz, which has a good crash safety rating.