how is annual depreciation determined; is there a formula or rule-of-thumb?
Depreciation is what the used market price is compared to new. Leasing companies have to make an educated guess as to what the depreciation will be in the future. I will post a link that may help you estimate the depreciation.
Link - https://www.themoneycalculator.com/vehicle-finance/calculators/car-depreciation-by- make-and-model/MASERATI/
CG's link. https://www.cargurus.com/Cars/price-trends/Maserati-GranTurismo-d1465
Looking for a Used GranTurismo in your area?
CarGurus has 838 nationwide GranTurismo listings starting at $20,999.
Search Maserati GranTurismo Questions
Maserati GranTurismo Experts
Find great deals from top-rated dealersTMSearch
Related Models For Sale