I've been looking for a used X and noticed that there are zero used X's for sale over 60k miles let alone 100k... why is that? There isnt a self destruct mileage is there?

I'm looking into getting a used X as a daily driver... i usually hit about 50 miles a day going to and from work.

I've been searching around and the only common problems i've been able to find is a rust problem and the bottom of the doors... and also the rear window popping out of the rag-top but i'm looking to get a Coupe anyway so thats square.

I was also reading that this uses Mercedes engine and transmission... which are quite expensive to fix but usually have no issues at all with them.

Any insight for a prospective new owner would be appreciated!
Thanks all!