1. Read customer testimonials before you buy anything. People are delighted to complain about bad service online, so try to find sites and testimonials which can be terrible so that you know what you're getting into. You ought to take bad reviews using a grain of salt, but if you see many, you know there exists a problem.
2. Be careful when it comes to the online stores that you consider buying from. If the web store is poorly designed, packed with misspellings, and overall fishy, you should take your money elsewhere. These are signs that something might not be right about this store. It's preferable to be safe than sorry.
3. If you want to buy a used product online, learn more about the vendor first. You need to visit their profile and look for reviews written by other shoppers who bought products out of this seller. Usually do not hesitate to contact the seller to question a few questions regarding the product you are interested in.
4. In case a company features a newsletter, register. Often, companies will give sneak peeks, deals and online coupons to people on their own mailing list. However, be careful. You don't want to sign up for every company's newsletter or you'll soon be buried under endless emails. Only subscribe to a company's newsletter in the event you really like their products and services and would use a promotion code.
5. Make it a habit to register for price alerts. This goes even for purchases that you've recently made. Price alerts will let you know when a product has dropped to your price you like. And if you've recently purchased at full price, it is possible to ask for a price adjustment to fulfill the new deal.