Sentence 1: Justin knew it was time for upgrade. 
 Sentence 3: His old car was with him since he turned 18 
 Sentence 4:  It was very hard for him to sell 
 Sentence 5:  Justin finally sold the car to move on with his life 
 Option 1: He wanted to take a road trip. 
 Option 2: He was having a baby with his girlfriend.