Here is a picture taken from a souvenir or gift kiosk located at Central Airport Plaza, Chiang Mai.
The items here are mass produced- and a lot of places sell such items. But if you can find these items in a lot of shops, then usually people would not be buying it a lot.
When a person choses the route to sell mass produced craft items, he/she would need to bring the items ahead or compete in pricing. Usually, because everyone seemed to be selling the same items, the seller finds that he/she is tied down with stocks that cannot be sold- even when a sale is being offered. No doubt, one has the chance of making some quick buck if the item is appealing and other sellers had not managed to grab hold of the supplier- but it will always be a race against time.