Like the last Guy said; it depends on how far he has already moved. If he hasn't budged on the price than your offer is reasonable. If he has moved and doesn't want to move anymore see if he'll toss in enough accessories to make it worth it to you. Which is better - $450 off the price or $450 in accessories? I personally would go with the accessories because $450 isn't going to make much of a difference in monthly payments.
Retired USAF, IYAAYAS!
2008 V-Star 1100 Custom Bobber project
2011 Crimson XR with Forged Highway Bars / Hard Bags / Passenger Backrest, Ness parts including Smooth Layback Plate Frame/Mount / Rad 3 Mirror / deep cut grips / drivers floorboards /shifter peg / brake peg / passenger pegs. Witchdoctor black rack, Lloydz filter / timing wheel / VFC III, 7Jurock windshield, Drag Specialties seat.