There are some items in this world only few of us can afford to buy, but even those few might feel like complete mugs if they were to splash this much cash on the following products – the most expensive of their kind.

Let’s go (window) shopping:

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18. Charles Hollander Chess Set

Price: $600,000 (£377,000)

Only seven of these luxury chess sets have ever been created — 320 carats of black and white diamonds.