The iPod Click Wheel
A thousand songs in your pocket, and white headphones that marked you out.
Apple's music player, and the click wheel that made scrolling through 5,000 songs genuinely pleasant.
The white earbuds were the advert. You could spot an iPod owner across a train carriage, which was entirely the point of the silhouette campaign.
Filling it meant ripping your entire CD collection, which took weeks and was somehow enjoyable.
Cost back then
£219
Goes for now
£80–£400; refurbished classics are a growing market