BMW introduced its E28 generation 5-series in 1982 with a lineup of inline 6 engines, including a turbocharged diesel, a number of gasoline engines and a hopped up M-version. This 1988 BMW 535is is equipped with the highest power non-M engine available, a 5 speed manual transmission and offered for sale on ebay with a current bid price of $4050 (reserve not met) -- this car could go for somewhere between $5-7k depending on number of bidders -anything more would be a surprise.
This E28 has been upgraded with a few cosmetic pieces such as the 'french' style yellow head lights, 17 inch BBS "basket weave" wheels and tinted windows. It has been lowered and rides on Bilstein shocks in all 4 corners. It is the "is" model that includes a factory air dam, rear spoiler and sport seats - all shared with the M5. The car has 263k miles on it - but it looks to have held remarkably well together over the years and miles.

