They probably don't actually *have* the item you need at the moment. If
they got a bad batch, they'll be having to wait until a new batch is
manufactured.

With computerized telescopes, a well-debugged secondhand one can be a better
deal than a new one. When I bought my current telescope, I had *almost*
completed a purchase from a member of this group, when a local dealer made
me an offer I couldn't refuse. I'm still regretting that I didn't go
through with the secondhand purchase; the one I bought new had to be
exchanged a week later, and then it needed further parts swapped out a few
weeks after that.