Shane
Sorry, mate, but it's just not that easy. Nothing involving HMRC ever is.......ask me how I know. There are two elements to any import charge. The first is the duty, which in turn depends on the tariff code which applies to the item in question. This is a 13 digit number which should be declared by the shipper, usually either on the package or with the accompanying documents. There may be a NIL rate of duty or it might be positive - there's no logic to it. If the rate is, say, 5%, then this will be added to the fully-delivered cost to obtain the "value for importation". Even then the bu66ers haven't finished with you, because there will be a VAT addition which is calculated at 17.5% of the import value, including the transport costs and duty. Yep - in this case you pay VAT on the duty. Who said life was fair?
A fag-packet guesswork calculation says that, if you work on 10% duty, that will give you $484 + 17.5% VAT = $568, which is very roughly £300 if you include the £13.50 for Royal Mail. I may be high on the duty rate - hope so. Can't see Office Doris having the pay Postie behind the door at that.
Before you complain to me about the silliness of all of this beaurocracy, please be aware that I retired from HMRC six months ago and I haven't missed it one little bit.
The best of British luck, mate.
FLJ