look and drive both of them, chose you favorite and have it inspected. Check the maintenance records, when its on a lift check the engine block to see if the engine was replaced or if it is Nikasil. Alusil is the preferred block if you have a choice. the one that is better wins, mileage is nothing and the money is nothing. At that price these both should be almost in perfect condition with the 8900 variety not leaving you much money to work with and will probably bring you way over the 10k mark.
95 E34 530I V2.37
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Those who make peaceful revolution impossible will make violent revolution inevitable.
John F. Kennedy