You send your money into a black hole.
It take ages for items to arrive (many times over two months), many purchases did not arrive, most of the sellers do not respond, you have no person or customer service to communicate with. The dispute process is long. In one case the dispute was approved, and i did not get the money back yet (40 days), in another case they did not accept my claim, although the item did not arrive. The process is not friendly, they sent me to check with my post office, did not notify me by email and allowed me 3 days to respond (not business days), and of course there is no address to respond to.
The few pennies that you may save do not wroth the waste of time and frustration