It truly depends on a number of factors. Did the car just sit outside for (X) amount of years of was it just driven lightly since it was purchased?

To answer your question manufacture date does impact wear to an extent, especially when it comes to rubber components on a vehicle; think gaskets, tires, hoses, etc. 2007 with 10K on the clock is ridiculously low mileage.

My family and myself have bought vehicles with a wide variety of years and mileage. To be honest there is no hard formula to it, you really just have to go see the vehicle and check it out for yourself. It seems like you know what you're looking for. For all you know this could be an excellent vehicle that was just a backup for someone, or it could have experienced some catastrophic failure and it just remained parked.

One way to have an idea of whether the vehicle sat or not is to get a CarFax/AutoCheck and look at the mileages for the vehicles registration over the years. Seeing as how you're in California this shouldn't be a problem considering how serious they take Emissions and Registration. I attached an example of one below, fairly steady increase in miles throughout the years.

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2004 BMW X5 4.4i-Sports Package-Premium-140,000 Miles