This way you can easily and relatively quickly decide if you wish to buy. But companies have to do more than simply took good. Most importantly, good businesses need to back-up this information with quality products and reputable service. If you're making a purchase locally you can always ask a sales assistant for more information. If you have a problem after the fact, you can return to the store and see the manager to discuss store policy.
Reputable companies operating on the Web offer similar services.
Before you settle on any one company, make certain that you've done some comparative shopping. If possible, locate several online companies offering the product you're interested in and compare cost and quality with local businesses. Make certain that you've read and understood any contracts that might be involved with the purchase of goods. Some Websites have long and convoluted contracts containing well hidden disclaimers or links to a separate page. Talk to friends about their favourite online stores and their suggestions for reputable companies.