Over time, everyone collects things that they don’t necessarily use anymore and these items often end up taking up space in our homes. While tossing them might seem like the easiest solution, some of this stuff could be worth a lot of money. Now is the time to sell your old phone, experts say. A number of devices – including some fairly contemporary ones – can earn a pretty penny when they appear on the auction block.

To people who have done the research, retro phones are flying off the shelves on eBay. Someone paid $39,000 for an unopened first-generation iPhone – which is fifty times the original price. So, if you have a bunch of old phones lying around, you could be sitting on a gold mine.

You might not have an iPhone first generation that’s worth $39,000 at auction, but you could have a device that is several hundred dollars. That’s what Protect Your Bubble found in their latest report about old phones being sold for high prices online.

The original iPhone, which was unveiled in 2007 by then-Apple CEO Steve Jobs at the MacWorld San Francisco event with the slogan “Apple reinvents the phone,” sells for an average price of $621 today.

If you have an old Motorola DynaTAC 8000X, you could get paid over $2,000 for it. The DynaTAC was the very first portable mobile phone and weighed a whopping 1.75 pounds! If you have one of these phones from 1985 in good condition, you’re in luck. They don’t make them like they used to only twelve were sold last year. You probably won’t get the $3,440 that it cost back when it was first released, but depending on its condition, you could get a decent amount for it.

The HTC Touch Diamond2 (seen above) is another old phone that can be sold for a profit. This model was released in 2009, a year after the iPhone 3G. Windows marketed this phone as a “personal digital assistant” and it can bring in up to $622.

According to data from eBay that was obtained by Protect Your Bubble, the average auction price for a second-generation iPhone (above), or the iPhone 3G is $346.

If you’re looking to turn a profit, check out these retro phones that are worth money:

Motorola RAZR2 – with an average sale price of $274.

Motorola Microtac 9800X – with an average sale price of $263.

Motorola International 3200 – with an average sale price of $247.

Nokia 7280 – with an average sale price of $206.

Ericsson T39 – with an average sale price of $168

Valuable old phones sitting in storage could actually be worth money. So, next time you’re thinking of hoarding something, remember this!