The car has an engine defect (broken engine oil ring, fuel mixes with oil and emits white smoke).
The car was fully repaired and prepared for the technical inspection. After the defect appeared a month ago, it was parked and has not been started since.
Engine repair ~1500€
New engine ~1000€ + replacement ~500€
Selling because a new car has already been purchased; if no buyer is found, I will replace the engine myself.