At that price point (for full bike) I’d be looking for something based on condition and fit above a particular model.
Look for something that has been well looked after and isn’t trashed, and that you cna go an inspect in person.
Obviously a multi pivot bike will be more expensive to sort IF it needs bearings, but look at condition now over other factors as a bike needing a new Drivetrain/pads/cables/BB/Fork etc. can be costly regardless of how many pivot bearings it has.
You should be able to pick up something decent thoguh, last year my Wife snapped up a Canyon Nerve XC with and XT/SLX drivetrain mix and Recon for £450, only needed new brake pads and tyres. Managed to get 12months out of it before having to do bearings, and now it’s good for another year or two, great bike for the money but she wasn’t specifically looking for a Canyon.