Hi watsonovedades,
I haven't personally used Chinavasion, sorry. Just a tip, though - before you begin using a drop shipper, test their shipping time and presentation by placing an order addressed to yourself.
If everything goes well, continue to carry out occasional test orders to make sure standards are being maintained.
I'm sure if you search through the forum you'll find a few references as to what other members think of Chinavasion.
All the best!