Also I noticed to be aware of the cam variator. Does this have an cost effective solution? Can any experienced mechanic identify this problem?
All the above is good advice. -
Brakes can be costly, so check they've got some life in them. The same with tyres.
Bushes will knock if properly worn, but uneven tyre wear may be an early sign.
Variators will rattle on cold start if they are failing. So make sure the car hasn't been started for a few hours before your viewing.
There maybe evidence in the service history of them being replaced already.
As said, check everything works. Usual suspects are Parking sensors, Auto wipers, Electronic parking brake, TPMS if it has it.
A/C compressor bearings are known to fail also.
Interior panels can also start de-laminating. That might be a problem in your hot country.