Master Online Sales: 15 Sites And Apps Every Seller Should Know

So, you’ve got stuff to sell—cool stuff, weird stuff, maybe even stuff you’re not sure how it ended up in your closet. Now what? Tossing it online sounds easy until you’re juggling apps, wondering which one won’t ghost your listings. So, here are 15 platforms that actually help you move your goods or fund your next impulse buy. 

Amazon

Selling on Amazon feels like stepping into the big leagues. You’re surrounded by thousands of others, yet there’s still room to stand out. The real draw? You can let Amazon handle the logistics—shipping, customer service, and returns—so you can focus on building a solid product line and growing your store. 

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eBay

eBay is where many online sellers get their start, especially those decluttering their closets or selling rare finds. The beauty is in its flexibility, as you can list an item and let the bids roll in or set a fixed price if you know exactly what it’s worth. So, it’s a great place to sell as you learn the ins and outs of the overall online marketplaces.

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Etsy

If your products have a creative flair—think handmade candles, personalized mugs, or digital art prints—Etsy is where your shop belongs. Here, you’ll want to put care into your photos and make your buyer feel like they’re purchasing something special. 

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Craigslist

Sometimes, the simplest approach works best. Craigslist lets you sell almost anything directly to people in your area. No shipping labels, just a basic post and a few messages back and forth. It’s especially useful for big, bulky stuff like furniture or exercise equipment. 

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Facebook Marketplace

Facebook Marketplace blends seamlessly into the app you already use every day. It’s great for casual sellers who respond fast and upload clean, well-lit photos, which tend to get the most traction. Plus, because it’s tied to Facebook profiles, there’s an added layer of trust in knowing who you’re dealing with. 

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Nextdoor

Selling on Nextdoor feels more like helping out a neighbor than running a business, and that’s what makes it so appealing. The buyers are just down the block, and chances are you’ll bump into them at the grocery store. There’s something satisfying about seeing your old bookshelf find a new life just a few streets away.

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OfferUp

This one is easy to use and focuses majorly on local sales, which means less packaging or shipping headaches. Sellers who reply quickly and meet in safe public spots often find it becomes their favorite way to declutter. You might list a few items once, then end up checking it weekly because it’s that simple to use. 

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Decluttr

Decluttr is for those items that still have value but aren’t worth the effort of taking perfect photos or haggling. Think of it as your shortcut for selling tech. You scan or search your item, get a price, and ship it out with prepaid labels. You won’t always get top dollar, but you trade that for speed and zero negotiation.

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Gameflip

Here, you can sell everything from Fortnite skins to physical consoles and gift cards. The platform feels like it was built by gamers for gamers, with clear categories and buyer protections that keep things fair. It’s also a smart spot for niche sellers who understand what other players are looking for and how to list it well.

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Gazelle

When it’s time to upgrade your phone or tablet, Gazelle gives you a clean, quick exit strategy. Instead of dealing with random messages or waiting for offers, you get a price upfront. Send the device in, and if it matches their inspection, you get paid. It’s straightforward and built around tech, so you’re not explaining or taking 10 pictures just to make a sale. 

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Poshmark

Poshmark allows you to snap styled pics and use hashtags to get noticed. Shoppers here are all about brand names and visual appeal. There’s even a strong resale culture that makes it feel like you’re part of something bigger—a fashion loop that keeps style moving and waste down.

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ThredUp

This one on the list appeals to busy sellers who still want their clothes to find a good home. You simply fill a bag with quality clothes and ship it off. ThredUp inspects and sells what it accepts, and you earn a commission. While you won’t control the final price, the convenience and sustainability aspects make it a favorite among those looking to simplify.

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Mercari

Mercari fits right in the middle of nationwide sales. It gives you the flexibility to list anything you can ship, and the app guides you through the process step by step. No storefront is required. You can casually list one item or build up a regular selling habit. The best part? You don’t need fancy tools or equipment.

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Bonanza

Bonanza often flies under the radar, but it offers a refreshing change for those who prefer a user-friendly interface. You can import listings directly from other sites and adjust them to fit your brand’s tone. It’s particularly good for sellers who want more control and aren’t quite ready for a full-blown storefront. 

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Shopify

With customizable storefronts and detailed analytics, Shopify turns casual selling into a structured business. Ideal for those ready to grow beyond platforms and shape their own customer experience. It’s not instant like OfferUp or hands-off like ThredUp, but it gives you the tools to do it right.

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