parttimer
Winger
Approved used will normally mean it's manufacturer standard backed warranty which is usually as good as it gets for fixing things, problem with a lot of independent dealers is the warranty given isn't worth the paper it's written on or at least involves faff getting things investigated and fixed. That peace of mind can be expensive though compared to market prices for what you're after but for some cars is a no brainer (second hand EV's or anything from JLR group for instance with potentially expensive repairs). If a modern car has been well looked after and serviced, it's just as likely to be sound no matter where you get it, just gotta know what you're looking at or have someone with you who does.