What you really need to watch out with these types of products is shipping price, because most will have some weight and size involved. Depending where you are drop shipping from and too, shipping prices could put you out of the market completely.
When drop shipping any products, always consider the size and weight of the products you are considering early in your plan, nothing worse than spending a lot of time researching only to find out that shipping costs are too restrictive to get into that market.