Put simpel, buy one with at full service record, and adhere to the service schedule in future. As Mopar writes, the cam and balance shaft belt shall be changed as to latest schedule, every 3 years or 80000 km, which ever occurs first.
Check engine oil level frequently and never let it drop to min. level (refill with ½ liter when midway between marks), until your have an idea of how often it needs refilling.
If you are living in a place where rust can be an issue, get it treated right away if never treated and every 2-3 years after.
Erik