I made the mistake that I did not request a document confirming the identity of the company in China and get certainty. I only lost a small amount is $ 300 but you need to stop these websites for further delusion.
Well, bad news! chinaflashfactory.com is a total scam! I exchanged 22 email messages arranging 100 4gb USB sticks, I sent the money and since then they have totally disappeared. They did not return the money and they never responded to any message again. I lost my money!
I placed an order with francenails.co.uk, which is one of many websites owned by francenails.fr and according to IP located in Paris and run by Guillaume Magnier. After placing the order Vat was added, which is wrong as I am purchasing as a EU company, so I used their contact form on their website to ask for a correction and reimbursement. When I checked with my credit card company, I found that FranceNails had billed me a higher amount in a different currency. The purchase was for GBP 174, but they billed me Eur 287, a 35 % increase from the actual order.