1. Be careful in regards to the online stores that you consider buying from. If the online store is poorly designed, full of misspellings, and overall fishy, you should take your money elsewhere. These are signs that something might not be right about this store. It's better to be safe than sorry.
2. When you are searching for a spot to buy a product and none of the results seem to be from familiar retailers, you need to be hesitant about entering your data. Look for security signs from Verisign or Cybertrust, which means you know the retailer is not out to take your money.
3. If you want to buy a used product online, learn more about the owner first. You need to visit their profile to check out reviews authored by other shoppers who bought products out of this seller. Do not hesitate to contact the seller to inquire about a few questions about the product you are interested in.
4. Make sure that you're entering your payment details on a safe and secure site. Look for "https://" in the URL from the site that you're seeking to buy something from. If you don't see that or no symbol of any website security, then it's probably a wise idea not to trust those people together with your account information.
5. Do more research on the online store you are looking at before ordering a product from their store. If a store does not provide quality service or products, you will more than likely find some negative reviews published on other sites. It is best to stay with online stores with an excellent reputation.