When you are trying to have a good deal online, its very important that you must pay attention to the seller's feedback and don't be impressed by the kind of warranties or the free shipping deals he offers, as we said: pay attention if its a scam; to detect them will be pretty easy if you follow the next steps:

1.- Check their recent transactions, can be an stolen account if there's no recent activity. Be sure there's at the very least activities in the last 7-10 days, otherwise reject it.

2.- Be sure that the seller has a positive feedback, below 95% should make you think about their honesty and if its a good seller and the transaction will be smooth and easy.

3.- Be sure that the item location is the same as the seller's location. Check if the location really exists, and if not it can be really suspicious.

4.- Check the payment methods, if he was receiving PayPal but now is not accepting it, be sure its not a scam and your money will be lost forever.

5.- Be sure also that the feedback belongs to sales and not to its purchased items, a valid feedback as seller is more trustable if its built along with good sales and honesty during the time.

6.- The last thing and most important to be checked is the BBB [Best Business Bureau] certification, which will give you the confidence since BBB is the bureau where the good sellers belong and its a warranty of honesty and good business.