for all your requirements mentioned above- 1. reliability, 2. lowest depreciation and easy to sell, 3. airbags- atleast 2 for the front passengers and the most important of all, 4. Budget- 70k, there is only one choice. yes you guessed it right- its the worlds best ever selling car till date- Toyota Corolla. it fits perfect for your requirements. I own a 2012 model 1.8 full option which i bought new and believe me, till today I never had any issues other than battery change and front brake pads, both which I did this May after 19 months . its spacious too, has dual airbags for front passengers, ABS, alloy wheels (full option), fog lamps, etc. the 2014 model is good looking too. go for it. cheers.