Whether you want to buy an existing website or app or sell yours for whatever reason, it's all about profit-making in the end. Buying an existing website might give you a rapid income turnover. Selling a side project or an app is also a way to make quick cash.

If you're searching for the best marketplaces to do this online, look no further. Here are the best places online to buy existing websites and apps or sell them.

1. Flippa

Flippa home page

Flippa is an open marketplace where you can buy and sell online businesses, ranging from advert services, domains, and mobile apps to websites, and more.

When you enter the Flippa marketplace, you'll see a list of web apps available for bids or instant sales, their net profit, and monetization strategy. You can also set a tracker on a product that interests you by watching it.

If you have a low budget, you can select the category of websites or apps you want to buy and filter the price down to a more suitable level.

Nonetheless, you need to be careful when buying a website on Flippa, as the onus of verifying the information about a listed business is on buyers. But thankfully, it lets you contact a seller directly for further verifications.

If you're a seller instead, there's a valuation tool that tells you the price worth of your app or website. There are also thousands of investors lurking around on Flippa every month. So, your app or website is more likely to get off the ground quickly with a sound deal.

2. Empire Flippers

Empire Flippers home page

Empire Flippers is another popular marketplace to look at if you want to buy readily profitable websites or sell yours.

The platform is a reputable marketplace that's sold millions of dollars of websites over the years. So, the probability of getting a good deal and selling your website rapidly without a glitch is high.

The website also takes sellers through a thorough human verification process before accepting to list their business for sales on the marketplace. So, this ensures that only verified and authentic websites or apps get listed.

Thus, the responsibility of verifying the authenticity of an online business you want to buy is on the Empire Flippers team. That said, you can also search websites or apps by niche and narrow down the price range to fit your budget.

3. FE International

FE International home page

With thousands of investors surfing FE International monthly, it's the best place to buy and sell SaaS, e-commerce, and content development websites.

That said, the websites listed here aren't for the faint-hearted, as they often have high valuations. Indeed, it's an ideal place to surf for credible online businesses in these niches if your budget is high.

Related:The Best Sites to Find Used Items for Sale

FE International operates a strict merger and acquisition system in that its business managers help sellers find serious buyers for their websites. Thus, it links verified website sellers with only qualified buyers at a closed marketplace.

The marketplace is a listicle of available websites for sale, their annual worth, asking price, and a brief description of each of them. Although it charges sellers for its services, it only does so when its business advisors successfully close a deal.

4. BuyMySideProject

BuyMySideProject marketplace

Want to sell your side project instead? BuyMySideProject is a place to sell that small project you've locked up in your repository for ages. The listing process here is easy and doesn't involve rigorous verification.

Like Flippa, BuyMySideProject is an open marketplace. So, you need to deal with buyers directly and seal the deal yourself. Of course, as a buyer, the onus is on you to appropriately contact a website or app seller to verify them before any transaction.

Although it's not as popular as other marketplaces on the list, you still have a high chance of getting your project sold when you list it on its open marketplace.

5. Transferslot

Transferslot homepage

On Transferslot, you can buy and sell any software, including websites, mobile apps, databases, small projects, and more on an open marketplace. It's one of the best places to make money online as a programmer.

To list your website or app on the Transferslot marketplace, you only need to go through a simple initial verification process by answering a few questions and providing your project URL. However, you'll also deal with buyers directly as this one is an open marketplace.

And if you're a buyer, you can also see the asking price and the profit on each project. It also lets you contact project owners directly to verify their authenticity further.

6. SellMyApp

SellMyApp homepage

SellMyApp is strictly a mobile app marketplace to buy or sell source code for apps, games, game templates, and app templates. Supported platforms include iOS, Android, and Unity.

If you're a mobile app developer, it's the perfect place to list your mobile app or game for sale in return for quick income. SellMyApp is also one of the first of its kind, and it's pretty popular, with thousands of buyers trooping into the marketplace every month.

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Here, you can also see the current asking price on each listed app or game and even buy apps for as low as $50, depending on your budget and interest. It operates as an e-commerce store, as you can purchase many source code at once and get it instantly.

Each source code in the SellMyApp marketplace also undergoes strict quality checks to ensure they meet selling criteria. So, you might want to check it out if you don't mind pouring your creativity into an existing mobile product.

Online Business Purchase and Sales Have Profit Potentials

Selling an app or website might become necessary due to high maintenance costs or the need to generate income rapidly. And for the buyers, it could turn into a profitable investment.

However, people resort to buying ready-made apps because some already have an established user base and might've even started generating revenue.

That said, we can't ignore the fact that, like any investment, buying or selling an existing app is also risky. So, a proper feasibility study will partly help you decide whether purchasing an app or selling it is worth the risk.