It wasn't that many years ago the Dino 246 was not seen as a legitimate collectible car. In many cases, Ferrari owners would argue over it's provenance, with it's Fiat involvement, and Non-Ferrari badging. Plus with the small displacement V6, it isn't particularly quick, so performance enthusiasts often ignored it as well.
As recently as the mid 90s, an example in good condition was able to be purchased for less than a new Camry. By the early 2000's, they were breaking six figures. In the last two years, the prices have skyrocketed into the $300-450,000 range. Perhaps the collectors are appreciating that Dinos are nothing if not visually beautiful cars, even if their provenance is not as pure as otherwise more collectible Ferraris. But before the Leonardo Fioravanti-designed Dino 206/246 was released in 1968, there was the stunning Dino 206 Competizione Prototipo.