Remember, always fit a product to a market. If people want what you have to sell, a big part of the battle is over. Test everything you do to see which approaches bring you the best return on your efforts. Remember that minor differences can result in big gains in profits. Know your numbers.
Most people mark up their products with too little mark up.
Always remember that you have to get at least a four to one mark up or better from your cost to what you sell for. Sure, some products have low mark ups because they re looking for long term customers. Some people lose money on the first sale just to get new customers. They know, of course, that they can lose money up front to get customers. My advice is make your profit in the first sale when you begin, for two reasons.