I'm not a sales person but my DH is a tech at a Lincoln/Mercury dealership.
Yes, the price of the warranty is negotiable. Also, check to see what type of warranty you are buying. Is is a Ford ESP or one sold by an independent company? What exactly is covered? What is the deductible? If it's not a Ford ESP, what other dealerships/service repair shops honor the warranty? (I know that there are a lot of them that are not honored at the dealership that DH works at)
As for having to decide by Monday, I'm not so sure that's accurate. I thought that you had until 36,000 miles to purchase a plan but I could be wrong.
Also, there are 4 ESP plans to choose from. I highly suggest that you check out the Ford ESP site and compare the coverage for the different plans. It also says that you can get a quote directly from their site. I would suggest that you do that and compare that to what the dealer wants to charge you.
The Ford site is genuineservice dot com
I'm so glad that we don't have to negotiate at all when it comes to purchasing a car or warranty. That's a perk that we get for DH working for a Lincoln/Mercury dealership. We pay the same price no matter which dealer we go to. Our last two cars were not purchased at the store that DH works at sine they are Fords and they can't sell new Fords at his store.
Best of luck!