I've said this many times regarding the negotiation on "price"....you need to negotiate all of the numbers at the same time.
1. $ above invoice
2. MF markup
3. Lease Aq. fee markup
4. Misc fees, if any (no MACO or advert. fees for Euro Deliv)
That "great deal" for $800 over invoice can quickly become $1200-1500 over. Be careful out there people!