Looks Too Good To Be True

Make sure you are purchasing merchandise from a reputable source. Research the individual or company to ensure that they are legitimate.

Try to obtain a physical address rather than merely a post office box and a phone number. Call the seller to see if the number is correct and working.
email the company to see if they have an active email address. Be wary of sellers who use free email services where a credit card wasn't required to open the account.
If a vendor will not provide you with this type of information, consider not doing business with them.
Check with the Better Business Bureau from the seller's area.
Check out other websites regarding this person/company.
Don't judge a person/company by their website.
Be cautious when responding to special offers (especially through unsolicited email).
Be cautious when dealing with persons/companies from outside your own country.
Know what you are buying — read product description and fine print for indications of off-brand or less-than-perfect condition items.
Inquire about returns and warranties.
Consider shipping and handling costs to ensure they are within your budget.
Make sure the transaction is secure when you electronically send your credit card number. The safest way to purchase items via the Internet is by credit card because you can often dispute the charges if something is wrong, or consider utilizing an escrow or alternate payment service.
Maintain records of all online transactions.