I thought I heard there were a tiny handful of pre-86 G18's out there. To the tune of nearly 100k per, IIRC.
Word-of-mouth rumor-- could be totally inaccurate.
Heard it, Heard that there was some PD in N or S Dakota with several of them (Fully Transferable) which they wouldn't sell due to liability concerns.
Nothing solid I've ever seen.
Hmm, I wonder how others would think of a Glock 18 has a duty gun.