I got in on the $120 LG G5 deal and needed some extra USB C cables and found 6 ft cables in white at Monoprice are on sale for $1.90 each. Add promo code GREEN20 to save 20% and knock the price down to $1.52 each. Standard shipping was $2.49 for me to Texas when ordering three cables. Price is only good on the 6 ft white cable.
https://www.monoprice.c
These look like pretty good quality that should last awhile. And Monoprice has a lifetime warranty on their cables too.