Wanted: Priscilla Of Boston 3050 Or Molly - Fast!

Can anyone tell me is $4k is the right price for the 3050? I believe these are both newer styles and I`m having a hard time finding them outside of POB salons. I`m getting married in April and POB is telling me that can`t have a gown made by then. So they`re trying to sell me the 3050 that is being tried on in the store for regular price. Is this right? Can I negotiate on these dresses?? HELP!! Thanks! Inexperienced-Bride-to-Be