So far, looking around a little, prices for the Mini does not appear to have dropped dramatically after the
Mini 2 appeared, but of course, the Mini value did drop, perhaps 20-25%, though perhaps that amount can be debated a little.. its also never clear to me anyway, whether users are having issues selling a Mini to get an
Air 2 or
Mini 2.
Flying Drones is not for everyone, its a complicated hobby, simplified a fair amount by DJI, but it still doesn't stop people from crashing them for issues that are not related to the drone itself, which raises the cost of ownership, even with some level of coverage from either DJI refresh or an insurance policy. So it can be a limited market. I've seen a number of drones on various reseller sites that say, not flying it anymore, or not flying it enough, lost interest, etc..
Like any tech, once a new model comes out, previous generations lose value, you can find perhaps some deals on Mavic 1's or other older DJI models beyond the Mini's, but they still appear to be in the $500 range perhaps, depending on quality and of course there are extras that the seller in many cases adds in that perhaps reduces the value of the drone, but increases the value of the package.. batteries, carrying case, other accessories that cost them money beyond a combo pack...
There is no way to know whether someone will be a good pilot and will fly enough to make it worth while.. There are factors there as well, if you live in northern climates, a good part of the year it's either just not comfortable or just too cold to fly. The inverse can be be true if its 90-100 degrees for weeks at a time in hotter climates.. Then of course the final nail of course is the specter of regulations making it harder to fly.