These parts are take offs from a 2003 Z4 3.0i. They all have under 10k miles.
Prices below are current new prices from Turner Motorsports' Website and Vorshlag.
aFe Cold Air Intake: $338
SuperSprint Cat Back Mid Pipe and Race Muffler: $1211
Bilstein PSS9 Single Adjustable Coil Overs: $2,195
Vorshlag Heavy Duty Camber Plates: $439
H&R 27mm Front Sway Bar: $217
Racing Dynamics front strut brace: $230
Grand Total New: $4,630
Steal it as a package: $2,500 obo.