For sale

2008 bmw 325
4 door sports package
white with black leather seats
sunroof, straight shift
40k miles
$21,500
contact george, 555-5492

2002 bmw 635 csi
2 door, black with black leather interior
straight shift, good condition
55k miles
$8,200
contact elizabeth, 555-9521

2004 porsche 911sc
black with white interior
targa, cd player, great condition
52k miles
$26,500
contact herman, 555-4322

2005 bmw 524
4 door, green with white interior
automatic, cd player
78k miles
$18,900
contact juan, 555-9842

2006 mercedes 300sl
4 door, brown with tan interior loaded, cd player
80k miles
$34,000
contact wilma, 555-9421

considering only mileage and price, which of these cars is the better deal?

a. 2008 bmw 325
b. 2002 bmw 635
c. 2004 porsche 911
d. 2005 bmw 524