Metal cartoon-character lunchboxes with their matching Thermos bottles can sell for hundreds or even thousands of dollars. One example is the King Seeley "Yellow Submarine" lunchbox from 1968, worth up to $1,300 ($350 for just the Thermos). The most valuable lunchboxes tend to be the ones from the 1950s through 1980s.
breakfast cereal boxes
It's very unlikely you have a copy of Action Comics #1 (featuring the first appearance of Superman) or Amazing Fantasy #15 (Spider-Man's debut) — but even more recent comics can have high collector's value, if they're in good condition. Keep an especially sharp eye out for comics featuring the first appearances of popular characters. For example: Amazing Spider-Man #129, from 1974, features the first appearance of The Punisher. A good-condition copy of that issue recently sold for over $4,000 on eBay.
Quick Cash Tip: If you've already tried selling your comics on eBay with no luck, check out Sell My Comic Books. As the name suggests, it's a website dedicated to buying old comic books. Getting an appraisal on your collection is free and simple.
luke skywalker action figure (1978)
'harry potter and the sorcerer's/philosopher's stone'
apple-1 computer (1976)
old cell phones
Next time you upgrade to a new phone, you might want to hang on to your old one just in case: even obsolete cell phones can have some collector's value. For example: a 1983 Motorola DynaTAC 8000x, one of the first cellular phones ever made, can be worth over $500 — even if it's not in working condition. Granted, that sum seems paltry compared to the phone's original $3,995 price tag (in 1983 dollars), but it's still a lot more than you'd get from simply tossing a phone in an electronics-recycling box.
Quick Cash Tip: You don't have to own a vintage or collectible phone to earn back some cash. Gazelle will buy used smartphones and other electronics that are from this decade.