Do not buy from a store only because their products are cheaper.
It is the best strategy to buy from a store that offer great
customer service / response time,
product selection,
availability,
product information,
low shipping costs,
shopper friendly site design,
superb delivery / deliver goods on-time,
and good return policy.
At each store, you pay a shipping charge per order, so the more products you order at once, the less per item you pay for shipping. Total cost of buying includes sales tax(if applicable), shipping and handling charges.
Some online merchants charge a slightly lower product price. However, they may charge you an transaction fee per item. On top of that, you'll also pay an additional percentage of credit card processing fee.
Check the bargain section of the merchant site before you check out.
Despite all the fear of consumers, there had not been news about a credit card number being stolen in transit over the net. If possible, buy from shopping site offer secure server. Try to input your shopping order at your own PC. Order with a credit card; it's still the safest way to shop on-line.