This is apparently a great question, because cargurus.com does, apparently, not know what a wagon is.
Cargurus. One of my favorite websites to browse cars, since they have that handy dandy overprices/fair deal/good deal scale showing how the price of the car relates to the average. Plus, lots of listings, and good search features.
So this morning I had a few minutes, and wanted to browse all wagons. I select "browse by body style," select "wagon" from the drop down, and voila, behold all the listings, expecting to see a plethora of Jetta Sport wagons, Volvos, a few BMWs and Audis, and, of course, a shit-ton of Subies.
Now let's take a look at what actually showed up:
Chevy HHR - Not a wagon.
Kia Soul - Not a wagon.
Chrysler PT Cruiser - Not a wagon.
Audi A3 - Not a wagon.
Honda friggin' Element. Not a wagon.
Ford E-Series van. Not a wagon.
Ford Transit Connect, Scion xB, Pontiac Vibe, Toyota Matrix, Doug's Nissan Cube...
Well, you get the drift.