Went to HAMFEST today and learned about Meshtastic!!! #hamradio #meshtastic 
Discussion
Did you buy one?
Not yet, going to pick up 2 in a couple weeks!
I think that sign said $100. If true, you might want to take a look at this since it's only $50 and so you could get two of them and you could keep one and pass one out to a friend.
SenseCAP Card Tracker T1000-E for Meshtastic
That's the same model I have.