If you want a nice zed that's not going to give you hassle, why are you considering one with 120k????
Doesn't make sense. If you can't afford more than £5,500 then you can't afford a "nice zed that isn't going to give you hassle".
This is what I was getting act in my pm dude.....buy at the bottom end of the market and it's a gamble (and the odds are risky) what you'll get hold of......could be an amazingly cared for high miler that still goes pop just because something has come to the end of its natural life.
In saying that the zed engine is good for that sort of mileage .....but again like I said the other bits and pieces may not be!
Personally a bud I'd just save a bit longer and get some thing for 6500-7k