If I don't see anything on management nor an office location and phone number, I'll run. You might look for sites with the Better Business Bureau tag as well. Second, remember that credit cards offer the most consumer protection, according to the Federal Trade Commission. So, you'll want to use the card but try to pay it off at the end of the month. Third, pay attention to privacy issues.
Many sites collect information to use for charting customer tastes and trends.
But others sell it, passing on personal information about you to others. Read the privacy policy and, if there isn't one, go elsewhere. Fourth, don't use passwords that are obvious, like your date of birth or your mother's maiden name. And make sure you do keep them private. Shipping and handling may add a considerable amount.