I have a 25 bar minimum on all wholesale accounts. They don't have to order every month, but they have to meet the minimum to get the wholesale price. I personally do not have minimums on the number of scents they pick, unless I am making custom labels, then it has to be lots of 5 (because of my labels). If you are going to do wholesale, you need to sit down and think about what your terms and conditions are.
I wholesale my bars at $3 each. The stores sell them anywhere from $5-7 each. What you can wholesale at will depend on how much you have going into each bar. I have price breaks as well. If they order over 100 bars the wholesale price drops to $2.75/bar. I also provide free samples for them to pass out to customers.
Here are some questions you need to answer (for you, not for me)
Are you going to have an order minimum? Is it going to be a dollar amount or bar amount?
What will that minimum be?
Will you have monthly or quarterly or yearly minimums?
Who will provide the display? If you provide the display, who will pay for it and own it?
Will those stores be the only one to sell your soaps?
Will you do custom soaps?
How will you work out payment? At time of delivery? Net 30?
Are shipping the soap or delivering it? Will there be a delivery fee?
What if they don't want to carry your soap any more, will you take the bars back?
Will you trade out stock that has become shop worn? Who pays for that?
Will you exchange scents that are not moving for ones that do, or what they buy is what they keep?
That is all I have right now off the top of my head. I know that there is a lot more to consider but my mind is blank right now because of the cold.