usb flash drives , micro sd card ,tablet pc and the electric products
is a counterfeit goods scam or fake web store from China selling copyright infringing items. Usually you get some low quality junk, or very often nothing, and they just steal your money.
okayt-eletronic.com is a fraudulent electronics store in China.
Keep in mind that brand electronics are usually more expensive in China due to VAT. If you see low price brand items you will get scammed.
The way it works is:
1. You send the money (usually via Western Union)
2. You get informed there is problem (usually customs etc.)
3. Problem can be fixed for more money (another 10-20%)
4. After payment, there is yet another problem…
This will repeat until you realize that you got scammed.
Or for phones you get 'lookalikes' of iPhone or Nokia models of poor quality with far less functions.