The value would be $14,000.
The formula we use is

where A is the total amount, p is the initial value, r is the rate of depreciation written as a decimal number, and t is the amount of time. Since it is depreciation, our value of r is negative. Using our information, we have:
A=25000(1-0.08)⁷ = 25000(0.92)⁷ = 13946.17 ≈ 14000