A 4 year old Hilux invincible with average mileage will be closer to 20k.
That's why Toyota sell so many .
That's still depreciation in 000's per year. I prefer mine in 00's per year. 4yo Toyota for £20k is twice what I want to pay for something to ride around in, I'd rather spend money on stuff that makes work easier or more profitable.
My vehicle budget used to be £5k but prices rose to a point where 5k only buys you end of line motors that lasted 2yrs before becoming too knackered. £10k pickups seem better value.