I had no idea Italy had a great firewall ....
For what I know, Communications Police or Customs may signal a site who is offending the law to a Prosecutor's office, who can order to block (obscure) the site to all Italians ISP's by redirecting the site's DNS to this page.
Users may circumvent this using a VPN or a browser like THOR (I did, just for curiosity).
I heard the reason for blocking many Chinese sites is the sale of fake goods, such as waches or bags.
Italians sites are obscured when they sell stolen products, or when they get the money without delivering the goods (eg: Hey, you won a 1000 Euros Iphone, please send 100 Euros for delivery and assurance, and I wiill disapperar)
EDIT : I've checked now and
www.dhgate.com is still obscured, but
www.it.dhgate.com is on-line.
Don't know what happened.
The meter is offered at about 100 Euros for the unbranded version, 200 - 250 Euros for the branded one
Best regards