$600 on Craigslist. Honestly, I was just looking for 18" wheels that fit. These came with 235/50r18 (vs OEM 255/45r19), and are 2.7% too small. (the Ford hubs are also 70.4mm bore, so care must be taken when mounting). I will replace with 235/55r18 Blizzak DM-V2 or X-ICE SUV when they wear out. I'm heading on a 900 mile trip for the 3rd weekend in a row, so that will happen pretty fast.
I used a GPS (OsmAnd app) to check the speedo, and it looks like speedo reads about 4% low right now (maybe it was >1% low from the factory).
Not sure about range, as I only drove 9 miles on the OEMs before removing them. I assume that Blizzaks will definitely hurt range! I've heard by maybe 10%-ish. The car claims that it got 329 Wh/mi. over 2700 miles, with 1800 miles of that on the freeway at about 77mph. I'm running "stock" PSI because I want the traction more than the range. That's probably equivalent to 339 Wh/Mi, factoring the incorrect tire size. Perhaps all-season 18" would get about 300 Wh/Mi over that distance at stock PSI.
I've heard that tread/pressure make the biggest difference, then tire width, then wheel aero is third.