Has anyone ever seen the Train Rail Crossing in the wild?

I've been able to score many a good Lego deal over the years, but this 4-piece set as alluded me. Has anyone even seen one of these in a bulk lot or just for sale among other Lego train track pieces? Or does the "reseller" market have a total monopoly on these? I know these weren't available for very long, but still it's wild to me that a 25$ set with 4 pieces is now over 100$ even used. Are there really so few out there to justify this monopoly? Is anybody even buying the marked-up ones? ...