You might think that old radios, stereos, and boomboxes wouldn't sell for much, but certain models can be seriously lucrative. A Sanyo M-X920K Stereo Boombox recently sold for $2,000 (£1.6k), while other examples frequently go for around $1,000-$1,500 (£775-£1.16k). And if you’ve seen Back to the Future or Groundhog Day, you may recognise the iconic flip-style clock radios (pictured) that feature in them. Turns out collectors are willing to pay a surprising amount for the timepieces, with Panasonic flip clock radios often selling for as much as $300 (£232) on eBay. See if you’ve got one lying around – time is ticking…

Check your cupboards for these 35 unassuming items worth serious cash