item transactions under $800 into US incur no duties/customs. you pay shipping of $40. anything above $800, DHL will invoice you prior to release of shipment. duties is approx 10% of item value. VC also offers prepay duties during check out but at the inflated rate of 15% instead of 10%. you're better off paying through DHL. they will email you link to pay online. it's quite straightforward and simple.
That is actually really good, I recently bought something from the US and it was under 100 and it was sent with DHL, ended up paying about 20 import duty and then they slapped a handling fee of 19 on top of that