What Actually Sells (Not What Sounds Good)
Every "best things to resell" article gives you the same generic list — trainers, phones, LEGO. That's not wrong, but it's not useful either. Knowing that trainers are profitable doesn't help if you don't know which trainers, where to source them, or what margins to expect.
This guide is different. Each category below includes what specifically sells well, where to source it, which platform to sell on, and realistic margin expectations. It's based on what's actually moving in the UK market right now — not theoretical advice from someone who's never listed an item.
If you're new to reselling, read our complete beginner's guide first for the fundamentals. This post assumes you understand the basics and want to know where to focus your sourcing energy.
Pokémon and Trading Cards
Why it works: The trading card market — Pokémon in particular — has been one of the most consistently profitable reselling categories over the past five years. Limited print runs, collector nostalgia, and a massive global community create sustained demand for both sealed product and high-value singles.
What specifically sells:
- Sealed booster boxes and Elite Trainer Boxes from out-of-print sets (margins increase significantly once the reprint window closes)
- Japanese exclusive products — imported via re-shipping services, these command premiums in the UK market
- New release products bought at retail during drops and restocks, then sold during peak demand
- High-grade singles from popular sets (PSA 10 chase cards from sets like Evolving Skies or Prismatic Evolutions)
Where to sell: eBay for highest reach and buyer protection. Cardmarket for singles. Facebook groups for quick local sales.
Realistic margins: 20–50% on new release flips. Significantly higher (100%+) on sealed product held long-term. See our Pokémon sealed investing guide for detailed ROI data.
Branded Trainers and Footwear
Why it works: Trainers are one of the most liquid reselling categories. Strong brands (Nike, Adidas, Jordan, New Balance) have built-in demand. Limited releases sell out at retail and command premiums immediately. Even non-limited models bought at outlet or clearance prices can deliver solid margins.
What specifically sells:
- Nike Dunks, Air Max 1/90/95/97, Air Jordan 1 and 4 — the silhouettes with the deepest, most consistent demand
- Outlet and factory store finds at 40–70% off retail — even mainstream models can be profitable at the right buy-in price
- Limited releases and collaborations — these command the highest premiums but require speed and often tools to secure
- New Balance 550, 2002R, 1906 — New Balance has been consistently gaining resale traction in the UK
Where to sell: eBay (widest audience, authentication programme for trainers), StockX (deadstock only, strict condition requirements), Vinted (good for sub-£80 pairs with zero fees).
Realistic margins: 25–40% on outlet sourced pairs. 50–200%+ on limited releases (but these are harder to secure).
LEGO
Why it works: LEGO has one of the most predictable appreciation patterns of any reselling category. Sets are produced for a limited time, then retired permanently. Once retired, sealed sets appreciate consistently — often 10–20% per year, with popular themes doing significantly better.
What specifically sells:
- Retired sets — especially Star Wars, Harry Potter, Creator Expert, and Architecture themes
- Current sets bought at retail with discount codes or cashback that are expected to retire soon
- Exclusive or limited-edition sets (LEGO Ideas, promotional sets)
- Large "display" sets (Creator Expert modular buildings, UCS Star Wars) that attract adult collectors
Where to sell: eBay is dominant for LEGO reselling in the UK. Facebook Marketplace works well for large sets where shipping costs would be prohibitive.
Realistic margins: 15–30% on current sets bought at discount. 50–200%+ on retired sets held for 1–3 years after retirement.
Electronics and Tech
Why it works: High demand, high ticket prices, and frequent product cycles create consistent reselling opportunities. New product launches (consoles, phones, headphones) often sell out at retail and resell at a premium during the demand spike.
What specifically sells:
- Gaming consoles and limited editions during launch windows
- Apple products — AirPods, iPads, and iPhones bought during sales events sell reliably
- Premium headphones (Sony, Bose) bought at clearance or with stacked discounts
- Smart home devices during Amazon Prime Day or Black Friday sales
Where to sell: eBay for widest reach. TikTok Shop for trending gadgets where the voucher strategy works well. Facebook Marketplace for local, immediate sales.
Realistic margins: 15–30% on most electronics. Margins are thinner than other categories because prices are more transparent and competition is fierce. Speed and sourcing price matter more here than anywhere else.
Branded Clothing and Streetwear
Why it works: Fashion is the most accessible reselling category. Everyone has clothes they don't want, charity shops are full of branded items, and platforms like Vinted have made selling clothing frictionless.
What specifically sells:
- Nike, Adidas, and Jordan sportswear — hoodies, tracksuits, and tech fleece are consistent performers
- Streetwear drops (Palace, Supreme, Corteiz) — limited releases that sell out and resell at premium
- Vintage branded clothing — 90s and early 2000s pieces from charity shops and car boots
- Premium activewear (Gymshark, Lululemon) — especially bought at clearance prices
Where to sell: Vinted (zero seller fees, fashion-focused audience), eBay (wider reach, better for premium items), Depop (trend-driven younger audience).
Realistic margins: Hugely variable. Charity shop finds can be 200%+. Outlet clearance typically 30–60%. Limited streetwear drops can be 50–150%.
Collectibles and Funko Pops
Why it works: Collectibles are driven by fandom, nostalgia, and scarcity. Limited-edition Funko Pops, vinyl figures, and franchise merchandise have dedicated collector communities willing to pay well above retail for the right items.
What specifically sells:
- Funko Pop exclusives — convention exclusives, retailer exclusives, and vaulted (retired) figures
- Vinyl records — limited pressings, coloured vinyl, and classic albums in good condition
- Franchise merchandise — Marvel, Star Wars, Disney, anime — especially limited or exclusive items
- Retro gaming — games and consoles from the N64, GameBoy, PS1/PS2 era
Where to sell: eBay is dominant for collectibles. Specialist Facebook groups for niche items. Discogs for vinyl records specifically.
Realistic margins: 30–100%+ depending on the item's scarcity and demand. Niche knowledge is your edge here — knowing which Funko Pop is rare or which vinyl pressing is sought after is what separates profitable sellers from people sitting on unsold stock.
Books
Why it works: Books are often overlooked by resellers, which means less competition. Certain categories — academic textbooks, first editions, out-of-print titles, and niche non-fiction — sell for significantly more than what you'll pay at a charity shop or car boot sale.
What specifically sells:
- University textbooks — high demand every September and January, often sell for £20–£50+
- First editions of popular authors — check for specific edition markers and print runs
- Out-of-print non-fiction — niche topics where the book is the only available resource
- Children's book bundles — parents buy these in bulk on eBay and Vinted
Where to sell: eBay and Amazon (especially for textbooks). Vinted for bundles.
Realistic margins: Individual high-value books can be 200%+. Bundles typically 50–100%. Volume is the challenge — you need to find the right books, which requires knowledge or scanning tools.
How to Decide What's Right for You
The best category to start with depends on three things:
- What you already know about — if you're a Pokémon collector, you already have the knowledge edge in trading cards. If you're a sneakerhead, you know which trainers are in demand. Start where your existing knowledge gives you an advantage
- Your available capital — electronics and sealed Pokémon boxes require more upfront investment. Clothing and books can be started with almost nothing from charity shops
- Your available time — some categories (clothing, books) require more listing time per item. Others (electronics, trading cards) have higher value per transaction, meaning fewer sales for the same income
Most successful resellers eventually sell across multiple categories — but starting with one and learning it deeply is better than spreading yourself thin across everything from day one.
If you want to know what's specifically worth buying right now — which drops are coming, which products have the best margins, and which restocks to watch for — that's what ResellRadar's daily alerts and community intelligence are built for. The categories don't change much, but the specific products and opportunities change constantly.