I think there's a fair bit of crossover among those who get into coffee and people who dig watches.
If you don't mind a bit of off-topic posting, I gotta say that both appeal to me for many of the same reasons, as they each potentially offer a surprising level of detail to appreciate. Similarly, mechanical watches and quality espresso gear are essentially-mature technologies, so the good stuff tends to last a long time and retain its value.
Unlike a watch, however, it's not that tough to do a full service yourself on espresso equipment. Right now, I'm restoring an older Elektra lever machine. It's looking a bit neglected, and I had to hotwire past the broken power switch to get it going again, but everything else still works well even after sitting unused for about four years. This particular model has been in continuous production since the '60s, and factory replacements can be had for every single component. I've already descaled it, so with a few gaskets and small fittings, it'll be functionally as-new. I'll also try to brighten it up a bit; I don't think there's a collector market that values original "patina" on these things:
It's not necessary to have a lot of bulky equipment taking over your kitchen to enjoy good coffee at home, either. The espresso stuff is more for relaxed weekends and guests; I mainly brew on the simple and perfect Aeropress, which only costs about 25 bucks. That and a half-decent burr grinder are all you need for a world-class cup at home, provided you have quality beans. Skål!