It is never off the cards, plus there is no harm if you check them out.
I bought two Prados 21,000 & 23,000 km driven resp.
I had to change all 4 front & rear pads
It was a complete surprise for most of us at the showroom
But I would have changed them even if they werent worn, these pads tend to get hard over time and the car was already 5 years old. Hard pads wont probably grip as well as they should.
Never buy cheap chinese knock-offs.
Brands like Hitachi or Akebono can be used without any concerns, personally I only use Genuine Pads, in both my personal and for sale cars.
wassalaam