Sending knife to USA

[Perrari]

Hi
I have sold my first knife outside the UK today going to the USA. As far as I can see from the internet there are no restrictions in sending it as long as it has the relevant paperwork. I think I will probably send it using Royal Mail Airsure.

Are there any makers out there who have had experience, good or bad in sending a knife to the USA ?
Any advise would be appreciated.

Thanks
Eifion