I have a few suppliers in the US. My invoice value varies between $500 and just over $1,000.
I HATE USPS because it ends up in the hands of ParcelfArce who hold your parcel, unlike other couriers, until you pay the charges. I have to wait to receive a letter telling me how much to pay, then I pay, then they deliver. I lose about 3 days worth of sales every time because of it. SO, I end up tracking the parcel and when I know it's at the depot, I call them to say I'll pick up so I can have my stock quicker. It's happening right now, they had the parcel since Wendesday, I'm waiting for that stupid letter and if it doesn't come today I'll have to go and collect otherwise I can't put the stock on the site this weekend and I will lose even more ''sales days''.
Fedex: I love them, they invoice you therefore much better for my cashflow as I pay when I can/want (within reason). However they are about to change the way they calcualte their fees by taking a %age instead of a fixed fee, so I think it will become more expensive.
UPS: very very quick from the US, they deliver to your door but you have to pay the charges by cheque there and then. I love them too and the delivery guy is very cute.
DHL: none of my suppliers use DHL from the US (China and Australia, yes but like Fedex, although they sometimes take a few months to invoice me!)
The invoice will show duty (they don't always charge you), VAT and the courier charge otherwise known as Admin Fee.
Bear in mind if not VAT registered, you might be asked for a TURN number. It's a temporary VAT number, doesn't cost a thing, you don't need to do anything about it, just get a number. Tel 01792 634004.
I didn't know about this until I had my first order with a value of over $1,000, below that it was unnoticed and it's only UPS who picked up on it.
Register for VAT? The threshold is around £62k (rolling year), so I wouldn't worry about registering for VAT now. I only registered once I had reached the threshold, and I applied for the flat rate scheme which is for businesses with T/O of less than £150,000 ex VAT (I think).
Bea