when i did my calculations, it was only around 3k more to buy out my lease compared to financing from the begining ..
i am still not sure if i want to buy it out, so having that option available at the end helps..
'15 M4 coupe (May ED 2015)
'12 M3 coupe
'09 335xi coupe AW/M-Sport/Nav/Premium/Cold/Sirus
'07 328xi coupe AW/Black Aluminum/Premium