http://www.edmunds.com/apps/calc/Cal...ion=lease_calc
Using the above calculator, this is where my 135i would lease out at per month:
Price $39,500
Tax +$3,259
Title +$593
DP ($2500)
36-mo. lease
Residual $22,910 (58%)
MF .0031
10k miles/yr
Security $650
Total amount financed $37,593
$644.54 per month