I worked at a small "automall" of several dealerships. Our system operated inventory numbers based on the last 6 digits of the vin#. Sounds like with 1 million

I worked at a small "automall" of several dealerships. Our system operated inventory numbers based on the last 6 digits of the vin#. Sounds like with 1 million options, you'd be fine. It didn't take long for duplicates to start coming up when you have hundreds of cars in stock, and sell hundreds a month. Let alone the problem with a car being sold new, and then being traded back in. That was fine, because we had a different leading digit for new vs used. But you'd be surprised how often a used car gets sold, and then traded in again at the same place. Now what number does it get? The same one. Fine, atleast they're not both in stock at the same time. Great. Sell it again. Then when a customer calls six months later, try and lookup the deal your most common way... Oh ya.. now I've got 4 possible deals for this car.