You can find out where you live with that information. Some evil minded people might be tempted to track down where you live, and steal your car or anything else they liked in the picture. Better safe than sorry.
Having said that, I don't see any harm in posting an old VIN number of a car you don't even own any more.
Just my .02. You'd think the way I hand out .02, I was rich, or something. Either that or I have an opinion on everything...
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