I could be wrong, but I don't believe this approach is going to be very productive.
I suggest you formalize your offer a a little more. Spec the car out, calculate the dealer cost. Figure out want color combinations would work and potentially some options you would be flexible on. Don't expect to find a 335xi configured exactly as you would build it to order in the next 5 days.
Then contact all your local dealers directly. Prefereably a person (internet sales may do) via email, fax, PM, given your time frame follow-up with a phone call. If it was me I'd include a target price $XXXX over dealer cost, be sure to indicate you are aware of available incentives. You will also increase your choices of vehicles, if you expand your search LA?, your might want to try PhillpeK (board sponsor). If do you search out of area be prepared to travel to the dealer to close the deal. Basically I suggesting a Rizzo method approach to this (do a search on Rizzo). If you can't travel, you had better find a CA in you area to work with (search available inventory) tomorrow or you are simply going to run out of time.
Most dealers (I know of one exception, not in your area) aren't trolling the board looking for customer leads. Bimmerfest members are looking for low margin sales. Just broadcasting I want to buy a XYZ BMW isn't likely to get a lot (if any) responses from dealers. If you want a good deal it is going to take a bit more work than simply strarting a thread on this forum.
Last edited by bmwKbiker; 07-26-2008 at 12:43 PM.