The beauty of an auction is that you never know what amazing items might go under the hammer, and if you're lucky, you might even snap up a bargain! Unfortunately, you'd need some deep pockets to afford the items in this round-up.

From artwork that once belonged to music legend David Bowie to a seriously swanky European supercars, read on to discover the most valuable collections to have ever sold at auction. All dollar amounts are in US dollars.