I would say there are two types of locality specific reptiles that of interest to breeders:
1/ Those species found only in small, specific habitats, e.g. RSPs, GTPs, Nactus galgajuga, etc., where you know the animals couldn't have come from anywhere else, therefore the locality is guaranteed (unless out-bred by some idiot).
2/ Animals that are morphologically typical (with little or no variation) to specific habitats or localities. e.g. Chappell Island tigers, Broad-headed snakes, etc..
To have a locality specific Atherton or Julatten carpet or Mareeba taipan is absolutely meaningless to me unless you working on some re-introduction / conservation program. As mentioned above, captive breeding diminishes specific locality qualities and fitness.