I have a set of brand-new, still-in-the-box H&R sport lowering springs available for an e92 generation M3. I bought the springs back in April 2020 from bimmerworld.com for $312.99 (still the current price online). I am asking $280 for them; you get a $32 discount for taking them off my hands.
I have decided not to install them simply because I have decided against having a lowered car.
Here is a photo: