Up for sale is a stock 135i M-Sport suspension. Springs, struts, shocks. You may have to reuse your old hardware and fasteners.
Price? FREE! You come pick it up. Came off an 09 135i with about 28k miles. Still in good suspension. Replaced it with the BMW Performance suspension and the wife says she's tired of tripping over it in the garage. Willing to ship at buyers expense. Will get pics if people want them. Would be a good upgrade for a non-sport 135 or a 128.