The desire to make some extra cash, combined with our collective conscience poking at us to be more sustainable, has led to a boom in the reselling market.

Take Depop. The peer-to-peer shopping app’s $62m (£48m) investment is evidence the demand is firmly there for the industry to continue to grow.

Of course, reselling is nothing new – eBay has been around for what seems like forever, and sites like StockX, which lets users resell hard-to-get products, have received huge backing in recent years. Depop’s niche, however, is that its demographic of millennials are after vintage, deadstock and everyday pieces more than they are, say, the latest buzz brand.

Depop functions like most social media apps, allowing users to scour through results based on customised searches, hashtags and curated pages to find a bargain – much easier than going to the local vintage shop in the hope of finding something decent.

For the buyer, one of the pros is dealing with people of a similar age and not a faceless organisation that just wants more money. Others enjoy knowing that they’re helping the seller, who, quite often, is getting rid of unwanted clothes to tide them over until payday, rather than build a business.

That being said, for many, Depop has grown into a platform that has the potential to make them some real money. Some have utilised the platform so proficiently that they’ve built a full-on business out of selling clothes online.

Harry Adorian (@adorjan) is one such person. He’s built a following of 10,000 people so far and prefers using Depop to sell his clothes over other sites. “eBay is such a big market for all ages and all countries, which makes it much harder to find trends. The market on Depop is much generally younger and cooler.”

Thinking of getting into the game yourself? With the help of some of the site’s top sellers, we’ve pulled together the ultimate guide to selling on Depop successfully.