thinking about purchasing 2000 740IL, 123k miles for $15k - what might go bad soon?

A local lot has a 2000 740IL with 123k miles - sort of tan/grey/lite purple color.
It has not been detailed and has some stitching coming loose, a few
scratches, cup holder won't close, cig lighter container won't close. Feels and drives good.
They are asking ~$16k. I've seen them go for several thousand less on ebay.
What are typcial problems with this car? What might go wrong soon or cost lots of $$?
What do you think is a good price for it?
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The radiators are poorly made, seems to be more of an issue in US cars. Maybe due to higher temperatures?
See www.e38.org.
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John G.Burns B.Eng, Bonny Scotland

What do you think a good price to offer is?
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