Megan Racing Coilovers pulled from my 2011 F10 550i (traded for M5)
Perfect condition. GREAT ride, BETTER than stock, as well as serves as a lowering mechanism for your car if you want it lowered. Never had any issues or complaints with these in the entire time they were used on my car.
Reference thread:
http://f10.5post.com/forums/showthread.php?t=623360
Save yourself the $2K of KW coilovers, these work great. New is approx $1K+ -- available for $875 OBO.
Located at LTMW in El Monte or downtown Los Angeles.