What's the mileage on the white one?
The green one says "extended warranty" available. How long, how much and by whom? What does it cover and where do you have to get the repairs done?
You really need to have each car inspected and get a report from/by a dealer/ind. BMW mechanic/AAA before you decide.
Also, are maint. records available? Have you done a carfax? How much tread is left on the tires? Any recent maint. done? By whom? When's the next maint due?
Find out if the car was maintained at a dealer. Call the dealer with the VIN and get a printout of the maint. done.
Check out edmunds.com or kbb.com for bluebook prices. Check this link for the TEN STEPS TO BUYING A USED CAR.
Also, you can always put an ad out for a "car wanted" and see what you get in your area.
Based on what's presented I prefer:
3) red (too much attention)
2004 E60 530is, Delivered 12/12/03, TiSilver/LGrey, PP, SP,PS, PDC, ACC, FRS, Step, Xenons, clear bra, body colored rear inserts. (Retired, 1983 henna red 320is)
2004 Corvette Z06 Commemorative Edition