Hi alentejano77,
Both sites being Chinese sites, it would be best that you stay away from them. And try finding other suppliers that are more reliable for you to work with.
Link hidden: Login to view - is barely a year old and does not state clearly if the mode of payment they accept is SAFE.
Link hidden: Login to view - was registered in whois just last month and when I tried visiting the site, firefox couldn't find the site.
What products are you interested in selling? We'd love to help you out:)