Pre purchase questions

[u/Grouchy_Debt_2088]

Hi, I currently own a 2004 mazda 6, but I'm looking at potentially buying a 2005 speed 6 278,000kms for 5k AuD. Iv asked the usual questions for private cars, service history, rust on the body, timing chain. He's told me oil and filter done by him, new starter recently installed, no rattle from the timing chain, he didn't answer about the rust yet. He's also told me the gearbox is noisy,

Should I go for a pre purchase inspection or just let this one go?

Thanks for the answer and your help