Buying from Amvona
I have a tripod with head, a ballhead, and a camera bag that I bought from Amvona (in three separate purchases).
Each were purchased at very favourable prices, when I won an auction.
I am quite happy with the quality and the features. Although the tripod isn't a carbon/magnesium model, it is large, stable, and it and the head work well.
One caution though - Amvona's customer service is terrible.
My bag purchase, and my ballhead purchase went without a hitch. I had them shipped to my US shipping destination. It wasn't the fastest shipping, but it wasn't bad.
However, I tried to customize my tripod purchase.
If anything goes wrong, they'll probably make good on it, but you will need a lot of patience, and will need to spend a lot of time and energy in the process.
You will have similar problems if you want to customize your order any way. As an example, I dare you to try and order extra QR plates for an Amvona head!
When you deal with them, you get the impression that they have about a 1/4 of the staff that they really need.
I would buy again, but only if I was prepared to deal with some hassle.
Matt