I think there's a lot of interest just down to their reputation for quality and the fact that they've been the "best" flags in the UK for a while. But between the fact they're no longer being made/serviced and the fact a few other decent makes have come out recently, I certainly wouldn't recommend going out of my way to try and get that make of buzzers any more.
If I was buying a set I'd be looking at the Refstech ones for a budget option or Ervocoms if you want to spend twice as much on an established brand. And once you've spent £600 on a set of buzzer flags, another £10 for a set of their basic flags to swap the cloths around on is nothing, so I don't think that's really a valid reason to avoid them.