Patrice,
I don't know about Québec, buy around here CAS is the primary LARP for good leather sales. If quality and authentic, name your price within reason. SCA and CW Reenactors don't generally have the deep pockets of the SASS folks and a lot of the reenactors reenact the leathersmith.
Like I have said, if you want to do leatherwork as a business, you will have to treat it as a business. You will have to make what the customer wants and for which they will pay a reasonable price. You may have to specialize in one or two disciplines. In CAS, you will make a lot of sales at a match, and if you give out a lot of cards you will get business from them. Have a lot of product made-up so they can feel and touch and buy. Horse shows and rodeo are the same. Print thousands of business cards and make sure everyone at the shows gets them.
You must know the folks you are going to deal with. Don't do the rodeo circuits if you don't know what is going on or more importantly, what the participants need so you can talk to them intelligently. Know where your potential customers are going to shop so you can have product there in front of them. Many times you will have to invest hard money to produce enough product and pay for travel and table fees to do a major show. Be careful and spend that money wisely, always attend the show the year before to see what the sales are like, spend every minute there watching and take notes.
There are many strategies that can help with sales, if your customer won't buy, then look at your customer or your product. I don't know how many times I have seen businesses who are just selling the wrong thing to the right market or the right thing to the wrong market. Except for the oldest business, every business has to adapt to survive.
Art