I've been acquiring some of these while working through odd BOB lots and find it an interesting topic. Not sure where my fascination with locals comes from, perhaps the variety of designs and place names.
Could also be as simple as something that doesn't say US Postage. And considering all the fakes out there it could be a minefield for the novice (raises hand).
If anyone else collects locals I'd love to see some!

#122L1

#143LP10

#143LP3

#41L1