Oldsmobile did not produce any W-30 442 wagons. As was stated above, this is another urban legend, like the famed 71 GTO wagon, 72 GTO convertible, etc. They never made them.
We have to remember that there are people out there that just got into our hobby, they have a LOT of money to spend, and want that "1 of 1". When they see or hear of a car like a 442 wagon or GTO wagon, they believe they need to act fast before someone else buys it out from under them. Then as they get more involved in the hobby, and start talking to people at car shows or cruise nights that actually know what they're talking about, the buyer realizes that he was taken. Now the buyer is embarrassed to take their car to specific car shows (like national events) for fear of being laughed at, so they stick to local shows and cruise nights. As time goes by, they grow tired of hearing comments about their car, so they begin to fabricate a story about how "this is the only one they ever made" (probably the same line that got them to buy the car in the first place), and argue with anyone that tells them different.
Hey, that W-30 wagon is still a cool looking car, but it's a fabrication. Now I'm going out to the garage to work on my 69 Chevelle SS ZL-1.
