September marks the transition from summer to fall, but what should Marketplace sellers know about this month? We examined DealNews shopping trends and learned which items were most popular with our readers last September, so you'll know what to sell in September 2021.

Welcome to the DealNews Seller's Guide. Today we’ll discuss five of the top items to sell online in September 2021. What products resonated with DealNews readers last September, and will they be popular again this year?

September marks the transition from summer to fall, from warm lazy days to the hustle and bustle of the new school year. But what should Marketplace sellers know about this month, and more importantly, what to sell during it?

To answer that question, we examined the shopping trends of DealNews readers in September 2020. So let's dive into five of the best products to sell online this September.

First up are home improvement products.

Much has been said about the DIY surge that's happened during the coronavirus pandemic, so we weren't surprised to see home improvement was the most popular product category among DealNews readers last September. And it doesn't look like the trend is going to end anytime soon.

According to Kermit Baker at Harvard's Joint Center for Housing Studies, "in the short term, many homeowners who deferred projects — both large and small — in 2020 are expected to complete those renovations once the pandemic is over. … Additionally, there has been an upturn in homeownership as younger households look to purchase homes, the number of multigenerational households has been growing, and remote work has given people more locational flexibility and the desire to modify their homes."

So which home improvement items are worth selling, exactly? Last September, items that resonated with DealNews readers included tubes of painter's caulk; 15-amp, 125-volt electrical outlets; rolls of 1.88-inch multi-surface painter's tape; ¾-inch electrical tape; LED garage lights; toilet repair kits; and flat-panel air filters.

Another type of product to sell in September is health and household items.

Refillable household items seem to have lasting appeal among our readers. In September 2020, trending products included toilet bowl cleaners, basil-scented hand soap refills, dishwasher detergent pods, 13-gallon tall kitchen trash bags, and packages of 40 double-A Batteries.

You might have good luck with allergy relief products this month, too. Among the health products readers gravitated toward last September were 100-counts of antihistamine tablets. That's making us wonder if lots of our readers have ragweed allergies! According to the American College of Allergy, Asthma, and Immunology, "the most common culprit for fall allergies is ragweed...In many areas of the country, ragweed pollen levels are highest in early to mid-September."

Like household items, dental and personal care products are purchased over and over again, and they also made our list of things to sell in September.

They may be ideal for sellers wanting to list items that rake in steady sales. In September 2021, consider selling bars of antibacterial deodorant soap, rosemary lavender-scented deodorant, 2-packs of "satin" dental floss, packages of waxed dental floss, and nail clippers with curved blades. All of these items resonated with DealNews readers last September.

Let's move on now to the fourth item on our list, which is home items.

Home products make our "what to sell" lists month after month, but the category is broad and always includes a hodgepodge of items. In September 2020, popular home products included 8-piece sets of interlocking storage bins, ideal for the junk drawer; dryer vent cleaner kits; matte acrylic paint; and 12-inch hybrid queen mattresses.

Our readers also went for 2020 Christmas ornaments, whose designs came complete with toilet paper, masks, and hand sanitizer. But we'd be really surprised if those were also popular in 2021!

The final item we'll recommend today is tools.

What do people need to complete all those home improvement projects they have planned? Tools! And you may reap the benefits from selling tools of all types in September. In 2020, trending items included DeWalt tools and accessories, PVC flagging tape, LED flashlights, 22-foot multi-position ladders, and safety glasses.

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