Advertising TC products depends of several factors, but the main question is – where you intend to sell (which country, which target audience). Do they use Internet for shopping, how much money they earn, is TC product cheaper or more expensive than staff they can buy offline, how much shipping cost etc.
No one will buy online what can buy in store nearby. So, start with products which are cheaper or hard to find. Anything else depends on who are people you expect to buy it.
