These old Apple computers could be worth up to $905,000 if you're lucky enough to own one

Each new piece of technology replaces its former version, but there will always become a point where the oldest gadgets start to soar in value.

What was once a piece of junk suddenly becomes a collectors item, and the thing you were happy to throw in the trash before could eventually be worth thousands - if not hundreds of thousands.

This is definitely the case with any rare CDs, DVDs, Blu-Rays, and even games consoles that you own, so it might be worth having a search around your attic to see if there's any old surprises lying around.

Apple, being one of the biggest tech companies in the world, is one such brand that you should keep an eye out for - as while their newest gadgets like the latest iPhone and iMac are always going to be the fastest - they're surprisingly worth a fraction of their ancestors.

The iMac is one of Apple's flagship products (Costfoto/NurPhoto via Getty Images)

The iMac is at the forefront of Apple's desktop computer output, but it's their first computer product - the Apple-1 - that is really worth the big bucks.

Designed and released by Steve Wozniak in 1976, the Apple Computer 1 was the first product released by the tech giant, and it's low production number of just 200 models combined with this iconic status has given it quite the value.

Lot 286 in Bonhams' 2014 'History of Science' auction was indeed one of these Apple-1 computers, and while its initial price was projected to be between $300,000 and $500,000, it was eventually purchased for a staggering $905,000.

What perhaps saw the price skyrocket so much is that, according to former Bonhams director Cassandra Hatton in an interview with CNBC Made It, this particular model of Apple-1 was within the first 50 produced.

The Apple-1 looks nothing like a modern iMac (Bonhams)

This adds further weight and antique value to the already rare product, so it's understandable how this particular Apple-1 was sold for so much.

It might look primitive to modern eyes, featuring mostly just an exposed PCB, but it remains an incredibly important part of both computing and Apple history.

If you've somehow managed to come across one of these yourself - or any other piece of ancient Apple tech - then it might be worth checking out its value, as you could be onto your own veritable goldmine.

This certainly isn't the only old and valuable Apple product though, as people have managed to sell their original iPhones for up to $190,000.

Perhaps the lesson we should all learn here is to hold onto our old gadgets - especially if they're first generation versions - as you never know what might spike in value 20 years down the line.