Need help with Chinese sites that I suspect are fraud

Hello everybody,

First to say, I'm very glad that I found this forum, dedicated only to dismantle scam sites and scam offers.
I really hope that you will be able to help me with this problem.

So, what do you think about this 3 sites?
I need help, because I don't want to invest in ordering products (which, you suppose-are pretty under the price) just to waste my money for items I will never see or will be unusable copies of original product.

1.)
CompanName: Topflysharing Technology Co.,Ltd
WebSite: www.topflysharing.com
Tel: 86-0755-33148569
Fax: 86-0755-33148545
mobile phone:008613113648569
Email:abby@topflysharing.com
MSN: topflysharing_abby@hotmail.com
Gmail : topflysharing.abby@gmail.com
Yahoo: topflysharing_abby@yahoo.com
Skype: topflysharing.abby
address:chuangye road,longgang area, shenzhen city ,china

2.)
Skype ID: happygosaleangel
HappyGoSale Electronic Co.,Ltd
Website:www.happygosale.com
Email: happygosale@vip.163.com
MSN: happygosale@hotmail.com
Yahoo: happygosale@yahoo.com
angle@happygosale.com

3.)
Website:www.hotsaleelectric.com
Skype :hotsaleelectric
MSN :hotsaleelectric@hotmail.com
Yahoo :hotsaleelectric@yahoo.com
Gmail : hotsaleelectric@gmail.com


Just to say some things that bug me.
Every one of these sites:
-receives payment only by WU/bank transfer
-has product that they guarrantee that is real thing, but some specifications, like double SIM or SD card tray are different form original

One of them sent me a license picture, but it's really of no use for me since I don't know Chinese.

http://imageshack.us/photo/my-images/19/7y55.jpg

Could that be a proof of good company?

I realy hope that you can help me with this problem, should I trust these sites?
Any experiences based on these sites?

Thank you all in advance.