I answered an e-mail for a free electronic cigarette and had to pay $7.95 for shipping. A few weeks later a charge appeared on my credit card for $149.90 from Prado. Called their customer service and was told to read the fine print on their web site.
The e-mail made no mention of this, but yes, the web site does. I got them to reduce my charges by $100.00 and cancelled, but be very wary of this company as they play make-a deal on refunds.
My credit card company has put a block on this seller, but itcould have been worse if I had not called immediately.