2tone

Hi guys I'm new to the site just joined today I recently got rid of my 03 expedition with the 4.6 and had no problems except a coil pack. So my question is I'm about to buy a 2005 supercrew cab xlt 4x4 with the 5.4 with 98,xxx the body is real nice no rust also has matching cap I'm buying it from a private owner for $9500. I have listened to the motor and it seems quite no ticks knocks that I can hear I drove it cold and let it warm up still did not hear nothing my question is what else should I look for? Cam phasers seem quite I'm not sure what else to look for and what about price? The guy told me he was second owner he bought it with 79,xxx and that was 3 years ago any help would be great