Guys! These cars were actually famous among mechanics for excessive engine oil consuption, prematurely failing timing chains and even engine blocks literally exploding their pieces!
The 08 Golf is already the sixth gen Golf, that mainly used TSI and 2.0 TDI engines. Both of them were one of the most unreliable engines on the market at that time.
The reasons why these cars are rather expensive for their age, is that they were expensive once they were knew, and most people have no idea about cars, and follow stereotypes that at best were true in the 90ies. They are overall well built maybe, but their engines had some fatal design flaws, like faulty oil control rings, oil-pressure controlled timing chain tensioners that don't work properly when the car is city driven, or in case of 2.0 TDI, early units had engine blocks so thin, they would crack apart, especially when poorly designed oil pumps failed to lubricate the engine.
My cousin could have actually been killed, when he was overtaking and a 2.0 TDI that didn't do even 70 k miles, exploded during the manuver. Not only he lost all power during the manuver, the brakes power assist went out too. Barely managed to decelarate in time. He had to call firefighters to clean the road because it was all covered with engine oil and pieces of metal from the blown engine.
The last good Golf was IVth gen, maybe VIth gen given it's a naturally-aspirated version.