First Company To Offer Quads? 1983 Avenger 400 (opens in new tab)

While not the actual first quad ATV, I believe this company made the first four-wheeled ATV a few years prior to this example that's for sale here. This rare 1983 Avenger 400 ATV can be found here on Facebook Marketplace just north of St. Paul, Minnesota, and they're asking $850. Here is the original listing,...