Be advised that buying from Holts is very expensive.

Let's say you buy a gun case for 300 GBP.

The hammer premium is 20% more

The VAT you must pay (even if American) is 22.5% of the hammer premium.

The freight is high, say $75 for the example above.

Customs is 3%.

You have a freight service charge of $10 on this end.

Your credit card will charge you a 3% foreign transaction fee on all of this.

Many CC firms give you a fake exchange rate that earns them an additional 3.75% vig!

So that 300 GBP gun case is now a $600 USD gun case, maybe more.