Is there a percentage of its full price, age correction etc, that will give the final minimum price of an aircraft if it isn't bought for a prolonged period of time? Or is the price will continue to go down to zero?
My rough calculation tells me that an aircraft will never go below 65% of it's value on the aircraft market. Only applicable when it is offered by AS, not by private airlines.
The "minimum" lease price of AS aircraft is way higher than 65% of true book value. Though, the exact value can be easily determined ... just order an aircraft type nobody ever uses, release it back to market, and watch the price move.