Here the red flags:

The VAT (BTW) number on the invoice belongs to a different company
There is no registration for BITTEC.eu B.V. found anywhere
The address quoted on the email (The World Trade Centre in Amsterdam) was not confirmed by the Centre management, who stated that the company is not a tenant and intend to take action.

Got a proforma invoice from this company for mining equipment. Does anybody have any experience?
The reason for asking is few red flags... or, maybe... just my paranoia...