Best Buy is offering the LG G6 for $5 a month:
"Get the LG G6 for just $5/month for 24 months when you buy and activate on a new line with a monthly installment plan for Sprint"
LG also just upgraded the warranty on the phone to 2 years.
You just have to register [lgg6promise.com]
the phone on their website.
I've been using the phone since it's release, and have been pretty happy with it.