Speaking from experience, you cannot take a UK price (especially from Forbidden Planet, whose prices are always very high) and assume that the converted US dollar price is what will be charged in the US. Unfortunately when it comes to collectibles, outside of the US there is usually only one distributor for these companies, and since they are usually importing only a small amount - often over very large distances - they need to increase the prices considerably to cover their costs. Plus, since they usually are the only distributor in a region, they are able to inflate the costs since they control the market. To sum up, international prices bear very little resemblance to the original price.