Funky_Monkey

Hi all, Finally got back into a Lexus after a few years and we decided to get an IS 250 SE with 112K on the clock. When we got the car I knew it needed a few bits sorting (headlights, minor scuffs, tyres) But after getting it and driving on the motorway for the first time I noticed at about 70+ the steering wheel would feel like its wobbling a bit, as if it doesn't know where it should be sitting straight (if that makes any sense). I've read a few things and people give many different answers, I've checked if it's due any recalls, just had the rear tyres replaced and will soon change the fronts and get the alignment done. Just wandering if anyone else has had this issue and know if its and easy fix or could cost me a lot? Thank you