I think it's hugely ignorant to dismiss the Late Roman Era and it's coins as something unworthy of interest. People perhaps have a cliché'd viewpoint of what is typically Roman, but they forget how dynamic the Roman Empire was and that it was never, ever, in a state of stasis - change was a permanent fixture, both in society and in coinage.
Another thing which riles me, and living in a rich town like Geneva I'm very exposed to this, is that some people see coins primarily as an investement, as opposed to historical objects to be studied. To the casual observer with a giant wad of cash, LRBs don't look very sexy and they are often dismissed by this crowd. That's a pity, but it's their loss and our gain, because it keeps prices reasonable. What I do find sad though, is when snobbish comments come in from people who should know better.