LEGO bricks resale AI
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April 24, 2025

Can AI Sorting Tools Empower a Resale Renaissance?

In an intriguing April 24 news brief produced by Retail TouchPoints editor Adam Blair, the notion of AI-powered sorting tools was concisely examined via the outlining of two contemporary case studies.

The first, Lithuanian-based startup Sort A Brick, leverages the timeless appeal — and currently blazing-hot market — for LEGO in a new way. Intuiting that there could be tens of thousands (or more) of attics and basements playing host to unsorted, and perhaps forgotten, bins or bags of LEGO bricks, Sort A Brick proposed a unique solution.

By leveraging the power of modern artificial intelligence, the technology is able to scan, identify, and sort random assortments of odd LEGO bricks into complete sets. In doing so, the tool unlocks a significant increase in value for potential sellers looking to take part in the resale market.

The outlet cited Ilya Malkin, co-founder and CEO of Sort A Brick, on the subject.

“For many, a disorganized box of toy bricks seems to hold only sentimental value. But when properly sorted into complete sets, these same bricks may be worth hundreds or even thousands,” Malkin stated.

“Our AI-powered system can recognize individual LEGO pieces and match them to potential sets with a high degree of accuracy. This level of sorting and identification would be incredibly time-consuming and error-prone if done manually. By automating the process, we’re able to unlock value that would otherwise remain hidden in jumbled boxes of bricks,” Malkin added.

AI Sorting Tools in the Fashion, Collectibles Resale Space

Blair sketched out a second scenario involving Venus Fashion’s Tosha Hays, who stated the following in an interview.

“I had a situation where I had swim separates — styles that only had tops left over in certain prints and others that only had bottoms,” Hays said.

“For a human to go through and match the styles into [sellable] sets would have taken weeks. But we can ‘feed’ AI the SKU numbers, as well as what the number means in terms of color, size and style, and it will automatically create kits that we can resell to the customer instead of [the separate pieces] going into overstock,” she added.

And while these two examples are early proof of a potential AI-driven opportunity in the resale business, other subsections of that market could also see an uptick in a similar vein — particularly in the collectibles market.

For example, vintage toys belonging to properties such as G.I. Joe, Transformers, Masters of the Universe, Teenage Mutant Ninja Turtles, WWF/WWE, and similar remain hot commodities on the resale market. There’s one major headache confronting both specialty retailers and the collectors they service, however: Accessories, such as weapons, garments, and other add-ons, are often difficult to source and are both sought after and add to the value of the core item when present.

According to Grand View Research, vintage toys comprised a larger share of the overall global toy market (versus ancient, modern, and contemporary categories) — a market worth an estimated $294.2 billion in 2023, boasting a 7% CAGR projected from 2024 through 2030 — with no signs of interest slowing.

“Based on type, the vintage segment led the market with the largest revenue share of 40.60% in 2023. Collectors are seeking to relive or preserve memories associated with past eras and cherished memories,” the market research company stated.

Could the introduction of artificial intelligence sorting tools lead to something of a renaissance in terms of reassembling these collectibles (or vintage ensembles), unlocking greater value while driving renewed interest in sales?

Discussion Questions

Will AI sorting tools be successful in unlocking even greater value in the resale market? Which particular product categories or brand line-ups seem ripe for opportunity in terms of leveraging this form of search and sort?

Has the impact of artificial intelligence tools on the resale market been overlooked in favor of a focus on retailers zeroed in on selling newly manufactured items? How much potential for profit exists in the used goods or resale market for those who are early to take advantage of this tech?

Poll

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Neil Saunders

I am not sure resale needs a renaissance as it has been growing heavily for a number of years. However, AI can help bolster that growth. It can also help improve productivity. The two things combined will be helpful to the bottom line.
 
On the demand side, one of the biggest challenges for a resale customer is finding what they want. For example, from our research with ThredUp, we know that 53% of younger customers feel overwhelmed by the vast selection of items available. This is because the resale marketplace is not uniform: it consists of hundreds of thousands of different SKUs. Traditional search isn’t always all that effective at weeding out what’s needed. AI-powered search does a far better job because it’s contextual. 
 
On the productivity side, listing all of the products is time-consuming. AI can help categorize and create descriptions and attribute listings. 

Craig Sundstrom
Craig Sundstrom
Noble Member
Reply to  Neil Saunders

Globally, the DIY resale market (peer-to-peer) seems threatened by having Customs agents interecepting your package.

Craig Sundstrom
Craig Sundstrom

What was remarkable to me in this story? A simultaneous mention of Denmark and Lithuania: perfect examples of rounding error nations that thrive in an ordered world, but seem to be headed for the Endangered Species list in our present one.

Last edited 6 months ago by Craig Sundstrom
Peter Charness

The U.S. Department of Energy projects that by 2028, annual electricity demand from data centers could reach between 325 TWh and 580 TWh, Goldman Sachs Research estimates that about $720 billion of grid spending through 2030 may be needed. Other estimates less precisely suggest that we need to multiply our electrical grid capability between 2 and 4X. AI is the hungry application driving a significant percentage of this growth. I say leave the lego’s in the box in the attic, and I’ll keep my unpaired socks in the back of the drawer where they belong. What exactly, imprecisely, or imperfectly is the ROI here?

David Biernbaum

Using artificial intelligence sorting tools, consumers can benefit from personalized recommendations as well as faster access to the products they are seeking.

A number of categories, such as vintage fashion, electronics, and collectibles, can be greatly benefited by AI, since it can help consumers discover hidden gems and rare items.

Further, AI-driven sorting can streamline the process, allowing consumers to easily find products that meet their needs and budgets.

By using artificial intelligence, we are able to sift through vast quantities of data quickly and efficiently, revealing items that may otherwise go unnoticed in a crowded market.

Consumers can discover unique or limited-edition products using this technology based on consumer behavior. Early adopters of AI sorting tools can tap into a lucrative niche in the resale market, attracting collectors and enthusiasts who are willing to pay a premium for exclusive items.

Gary Sankary
Gary Sankary

As a parent who raised three Lego fans, and is now the proud owner of exactly such a bin of random blocks that haven’t been looked at in 20 years, this is my new favorite use of AI, I love this example, when someone figures out how to use AI to sort and grade apparel, that will be game changing.

Nolan Wheeler
Nolan Wheeler

Turning forgotten LEGO bricks or mismatched clothing into sellable sets is a brilliant use of sorting AI. Resale is already growing, but this kind of tech could accelerate it, especially if it’s easy for everyone to access. There’s a ton of potential here, and I’m curious to see where it may be applied next.

BrainTrust

"On the productivity side, listing all of the products is time-consuming. AI can help categorize and create descriptions and attribute listings. "
Avatar of Neil Saunders

Neil Saunders

Managing Director, GlobalData


"This is my new favorite use of AI. I love this example, when someone figures out how to use AI to sort and grade apparel, that will be game changing."
Avatar of Gary Sankary

Gary Sankary

Retail Industry Strategy, Esri


"Early adopters of AI sorting tools can tap into a lucrative niche in the resale market, attracting collectors and enthusiasts who are willing to pay a premium…"
Avatar of David Biernbaum

David Biernbaum

Founder & President, David Biernbaum & Associates LLC


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