That's more than I pay for my OEM Motorcraft rotors, pads, pins and boots. And I get 55,000 miles out of those in city driving. I swear by them after years of cheaping out with aftermarket junk that warps in a month.
To each his own I suppose.
Anyone doing these brakes, in the northeast at least, should be prepared for rotors that don't want to come off. You need at least a big lump hammer. Prepare to do some work. The 2008's and maybe 2007's had an odd hardware and caliper design. Do some research on this site if you are working on them.
I change the caliper pins along with boots and all hardware. I also use anti-seize when I replace the drums. It's all cheap insurance. Also it's quite possible to find your parking brake components rusted to uselessness, so you may have to buy a set of parking brake shoes and hardware at the last minute...
I forget if the Expedition requires a 9mm Allen socket. If it does, shop for one in advance, as you'll be riding around a half dozen parts stores looking for one after taking your wheels off.