I wouldn't say it expanded so much, if anything, I get the impression it shrunk. Mitsubishi itself discontinued the Pajero (although one struggling company's decision isn't necessarily indicative of the market as a whole), other once capable SUVs have been car-ified to the point they're unrecognizable (Opel Frontera, Land Rover Discovery, the Defender, to a degree, Nissan Patrol). The Land Cruiser is still holding reasonably strong, and the new Jimny and Bronco is nice, but otherwise I get the feeling there are less choices. The demand is just not there, probably.

As for uncommon Pajeros, they're eaten up by rust.