You might call the guys that are advertising them and see if they can cut a deal?
They can't advertise a discounted price but they may be able to sweeten a deal privately if they've got something sitting around and wish they could sell it. They likely got dated terms from the manufacturer to have it in stock, or paid a little interest on a loan to get it, and when the date's approaching for a serious payment they're getting antsy.
If they're just taking your order and drop-shipping from the mfg they may not have any leeway, but they might.
If a dealer has something in their inventory like a car that's $40,000 all it takes to get it off the truck onto their lot is a loan, the bank pays the manufacturer, and they've only got a few hundred bucks into it so they're absolutely motivated to deal.
This is all FWIW, is what I've gleaned about stocking and selling expensive stuff...