Loganman, I paid a fixed dollar amount over dealer invoice, so adding the Individual paint color was at invoice (and replaced the upcharge for metallic paint option for SS II), so in round numbers it cost $4000. I actually ordered the car in SS II, then switched to Moonstone, so you could say the decision to go Individual had no impact on the deal.
My friend at the dealer and I spent <30 seconds negotiating price (if you want to call it that). I've purchased or leased umpteen cars from them in the past 15 years, so we have a gentleman's agreement on what constitutes a fair price for both parties. Sure, I could save another $500 or so by spending hours or days hunting, shopping and haggling .. but my time and my relationship with the dealer is important to me. Such a close client/dealer relationship has many subtle perks (like getting BMW Distribution approval for Individual color combo in <24 hours).
E39 M5, E46 M3, E83 X3, E85 Z4M, E86 Z4M