You should find out the true value of the product or service before you make a decision to purchase it. If it is a new product on the market you should check out the price that other retailers are selling it for. If it is a reconditioned or a used product you would obviously want to pay less than retail price. So always do your research on any product before you buy it? You need to look at the life span of the item, Is it seasonal? Is it going to be replaced? An example is you won't buy Christmas decorations in June that would be a complete waste of time and money nor would you buy computers that are already 1 year old because it will soon be obsolete.
If you are buying based on a photo and it is not detailed enough for you to make a decision you should get into contact with the merchant to get clarification before you buy it. You don't want to waste your money that you worked so hard for on an old or vague picture... You need to know if the supplier offers a money back guarantee or warranty and what are the return terms after purchasing a product. You don't want to end up stuck with products that does not work or that you're not satisfied with.
Decide what your budget is and don't stray from it. Don't be taken by some savvy salesman and pay more for the product than you are prepared to. Remember to consider shipping and handling expenses to avoid paying more for the item. Go online and try to find out the true value of the product so you can get an idea of the going price of it or even get it at a cheaper price. You want to know how long the goods would take to arrive because you don't want to loose potential and existing customers due to of out of stock issues. You need to factor in shipping time and the time it would take to clear customs. You also need to know that your supplier can give you an adequate and constant supply of product to ensure you have a good enough supply for your customers.
You need to know the payment options that the merchants accepts before you bye. If they only accepts money order, cheques, it would take a lot longer to finish a transaction and receive your goods than if they accepts credit or wire transfers. If they do accept credit cards try to ensure that there server is secure. One thing that you must do is check out the merchant, Find out if customers have complained about his products or business policies before spending your money and getting into a joint venture with him. This can save you allot of grieve and heartache. If you would like to know more about on this topic check out the attached link.