Why are some BMW's certified and others are not?

Just visited the local BMW dealer for a test drive and found several used cars with few miles (%26lt;30K). Some of the cars were certified pre-owned and others were not. Sales person said it was because the techs did not have time to certify all cars, but I smell a rat. Anyone shed more light on that may be really going on?Why are some BMW's certified and others are not?CPO cars also are typically newer and low miles. It costs money to do all the inspections and fix it up to be CPO which leads to a higher sticker price. Depending on its condition it might be cheaper for the dealer to just sell it As Is instead of paying to fix it and selling it as a CPO. This doesn't mean its a bad car its just got a little more wear and tear and like any used car you should also make sure its properly checked out by someone other than the dealer before you buy.Why are some BMW's certified and others are not?BMW cpo cars have been inspected to makes sure all defects are repaired before you get them, and carry an extended factory warranty. Some of the things done in a cpo inspection include returning all non-factory items to stock, including tires and wipers. And making sure all maintenance is up to date. As well as fixing any cosmetic flaws. If looking into the purchase of a used BMW I personally wouldn't buy one that was not a certified pre-owned car. If you have any doubt that they are done right, and everything gets checked, the BMW dealer I worked for got fined $10,000 by BMW because a 750i on our lot had a non-original spare tire in the trunk. They do look at these things.Why are some BMW's certified and others are not?1 cpo is a 100+ point check, with all defects being noted/fixed, fluids up, wear replaced - within a $ margin. (check #'s vary depending on make)

#2 cpo requires clean service history at certified brand dealer.

#3 cpo has a max mileage allowance.

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