Location?
I'm in the San Francisco Bay area of California. I've seen native plant sales on Nextdoor.
Also, even if the buyers aren't interested in natives you are still distributing them in your area.
I've considered growing a local oak from acorns. I've found a couple growing randomly on my property and there is a park across the street with some huge ones (and lots of acorns).
Edit - I've also seen some local groups having trades, donation, giveaways.