Most retailers have marked the prepaid iPhone 6s down to $99, Target is offering it at the same price and will include a $30 Target GC with in store activation on an unlimited plan. It states online also, but adding it to the cart I didn't see the GC included.
$30 gift card in store with qualified activation
In-store or Online
Terms & Conditions
$30 gift card in store with qualified activation of a Total Wireless Prepaid phone and unlimited plan. Reserve online and pickup in store. Available only in select stores with Target Tech. Quantities limited, no rain checks. Offer expires 1/4/2020 at 11:59pm PT.
I just bought one off the rack for $95 using Redcard still sealed. The associate got a lead to override the system when it wouldn't spit out a GC and created one outside of the sale. So, out the door with an unactivated sealed up phone and $30 GC for $95. No tax in my state. Obviously, YMMV.