I sold my 2011 Z4 is -
I have a BMW shorty OEM antenna $40 OBO for Shipped
A Cobb Accessport V3 - (needs to be relicensed) with all papers, cables and case - $450 OBO Shipped
BMW OEM Z4 (E89) car cover - used in garage 3 or 4 times - in VERY good condition. Bulky $130 Shipped
BMW OEM Battery Charger OEM Part # 61 43 2 354 555 new, with box, papers, storeage bag, everything $120 OBO shipped
I can send pictures to anyone interested, just let me know.
I take Paypal and am a EBAY Perferred seller - Trust on the transaction is why I tell you this.