The fun of depreciation isn't relegated to rare exotics. Big German luxury cars are notorious for losing tens of thousands of dollars of value within just a few years of being bought new. One of the most interesting cars I've come across recently is the Alpina B7.
Introduced to the US in 2006 for the 2007 model year, the Alpina B7 was marketed as a performance-oriented 7-Series in place of an actual "M7," which BMW decided against building. The first car used a supercharged version of the regular 7-Series 4.4-liter V8, producing 500 horsepower through a six-speed automatic. Rear-wheel drive is standard, while xDrive is an option. Nowadays, cheap examples can be had for nearly $100,000 off MSRP.
A quick search on Cars.com revealed a handful of B7s under $20,000—a far drop from the car's original $115,000 price. For that, you get a Alpina-specific bodykit, a hand-built Alpina interior, and of course, those spectacular Alpina multi-spoke wheels. is listed for just $12,500, which seems like a steal.
If you're interested in the next-gen B7, prices aren't that much more, and you get a whole lot of upgrades over the earlier cars. Standard improvements starting with the 2011 model-year B7 are new looks, a new 500-horsepower twin-turbo V8, and a ZF eight-speed automatic. Prices for these cars range in the mid- to high-$20,000 range, but there are still a couple of cheap outliers out there.
Of course, the reason these cars are so cheap is because they have so many miles on the clock. Every car mentioned so far has at least 100,000 miles racked up, and like most BMWs, the B7 doesn't have the best reputation for reliability. But if you want an Alpina in your life, and don't want to deal with the hassle of bidding for , an old 7er might be the car for you.