Used car – engine change (finger off or not?)

Hello, I am looking for a used car and have found an attractive offer online. It is an Audi from 2012, almost full equipment, only 55,000 km and cheaper than many other similar cars. However, it is described that the vehicle was a long-haul vehicle and ran between 2012 and 2015 almost 230,000 km, after which the engine was switched to which has now run 55,000 km in the past two years. also a slight accident damage was eliminated, however all works, including engine change from Audi were carried out and the car is very well maintained and first hand. In addition, the car has an S-Tronic automatic transmission and is not manual gear shift. Finger off from the car or should the engine change not shy away from the purchase? Thanks