US retailer Barnes & Noble will be carrying the Black Series Guardians of Evil 4-Pack as well as Gamestop. For what ever reason the set is actually $10 cheaper at B&N. This is therefore the cheapest option for US collectors.
But it also provides a lower price option for UK customers as like Gamestop, B&N will ship to UK. Once you add to basket and get to checkout you will be adding $12.98 for basic shipping to UK, that is a total of $92.93. This equates to £71.75.
However, the item will be subject to Import VAT so you need to add 20% to this which is £14.35. There is also not an option to pay this in advance, so if your item is held for Import Tax on arrival to the UK it will also incur an "admin fee" which would be between £8 and £15 depending on the carrier.
That puts the set at a total of £101 at worse.
*all prices and £ value are provided to the best of our knowledge and at the time of posting