I have one too, and in perfect condition. But never thought of selling it, not even for that dough. And seems the guy indeed paid all this money to get it. The price for a MR Falcon LOL.
In the end glad I got my own M19 (and M38 & M40) scope before these crazy prices. The idea with these genuine vintage greeblies and real parts is that most are not made anymore, they are hard to find, and they are hunted by both Star Wars and militaria collectors, and thus prices are going up constantly. A couple years ago you could get a M38 or M40 scope (used on E-11 blasters) for $70-80, and a Hengstler Eagle with metal sleeve for similar price or even less. Now they are $200-300, and continuously rising. The same with other scopes used for Fett or the other Han blasters. Also look at genuine Graflexes, crazy.
And if you want nice decently accurate blaster or lightsaber, you can get a Master Replicas. But if you want a really accurate prop, made just like the screen used, with real vintage parts then in many cases you need to spend a lot more than on a MR prop replica. But well worth in the end, because you'll have a prop that would be just like the screen used. And for some of the people crying about dings and warts on props, we can only say that one of the finest qualities of Star Wars, among so many others, was that the movies showed a used universe, and that made it believable.