Throwing a heavy-duty cargo basket on your roof changes how you pack, but it also creates wind noise and knocks your gas mileage down a bit. We look for these late in the summer when outdoor gear goes on clearance to clear space for winter stock. You can usually find a solid setup for about $350.
Never mix up negotiating the price with how you pay for it. Hammer out the best deal on the basket first, then figure out your payment method for what is left over.
Remember that the 0% intro window is a strict deadline, not free money. If you still have a balance left on the Citi Simplicity® Credit Card when those 18 months are up, deferred interest or standard rates will kick in on what remains.