Honeyville is having a cyber monday sale, 20% off your order. The promo code is Gift. The sale ends on Friday.
They sell many things that are found in soylent. Shipping is a flat rate $4.49. If you are serious about soylent, and ok buying in bulk it is a great deal. They have some of the cheapest prices without the 20% discount.
I just bought 44 lbs of Whey Concentrate 80% and a 5 lbs bag of coconut flour and saved $80.