$11,000 ~80K Miles 2004 BMW 530i --- possible?

Absolutely! It has a good deal to do with your location and availability. Off lease vehicles are perfect options. Craigslist is even a decent place to shop, provided you know what you are looking for and have the mechanical savvy to know what questions to ask and what problems to expect.

Yes it is possible. I have a 2004 530I with sports package etc.. that is gently used with 39,500 orig miles.

Deff possible, try autotrader.com

worth between $10,850-$17,625

Possible but its like finding a needle in a haystack. Low mileage well cared for e60 BMW 530i would have to be priced lower than the e39 530i which if you look at Craigslist are priced higher than what you are willing to pay. for e60. Good luck.