A group for flower growers to find buyers using phone photos

Flower growers here must sell at the price the wholesaler offers after picking, because they do not know of other buyers. Ten or twelve growers form a group. At picking time take clear phone photos, and one young member sends them to city flower shops and decorators to ask prices. Who bought at what price is written in the group book for all to see, so next time they can bargain from a stronger position. You need one young member with a smartphone, a shared book, and a little trust.