One search. Every marketplace. Powered by AI, so you can sell in seconds and find the best route to buy.
Tell SellBuy what you want to sell and what you want to buy. Our AI searches the UK's leading marketplaces, compares prices and finds the best place to sell and the smartest way to buy.
We found 12 results
The fastest way to sell anything
Just describe what you want to sell. SellBuy's AI helps with pricing, listing and routing across the marketplaces where demand already exists.
Find the best deal across every marketplace
Stop switching between tabs. Tell SellBuy what you want and our AI searches, compares and recommends the best options in seconds.
In plain English. No filters, no categories and no complicated search forms.
SellBuy scans the major UK marketplaces together, so the user does not have to.
Results are ranked by price, condition, seller signals and overall value.
Not just another marketplace.
The AI layer above all marketplaces.
SellBuy does not compete with established marketplaces. It connects them through one conversational interface: one search, one comparison layer and one smarter way to sell and buy.
Real-time pricing intelligence helps sellers avoid underpricing and helps buyers spot strong value.
SellBuy understands context including condition, age, location, urgency and buyer intent.
Search across leading UK marketplaces, compare options and choose where to complete the transaction.
From description to live listing in under a minute.
Find exactly what you want, faster.
One search across the UK's leading marketplaces
AI compares thousands of listings instantly to find the lowest price.
We find the marketplace where your item is most likely to sell quickest.
AI suggests better alternatives, hidden bargains and trending items you'll love.
28 Million UK Adults Already Buy Second-Hand. The UK circular economy is one of the fastest-growing consumer markets in the country.
SellBuy is positioned at the centre of it.
The circular economy is not a niche trend. It is a structural shift in how the UK consumes, with second-hand now mainstream, commercially meaningful and better aligned with how people want to buy.
Second-hand is moving from occasional bargain hunting to normal consumer behaviour across categories.
Resale extends product life and reduces pressure from raw material use, transport emissions and landfill.
Cost-of-living pressure and better-quality pre-owned supply mean second-hand is increasingly a first choice, not a compromise.
Sources cited in the SellBuy slide pack: WRAP Reuse Survey 2024, WRAP Material Flows 2024 and Mintel UK Consumer Attitudes to Sustainability 2024.
| Category | Share | Value |
|---|---|---|
| Fashion & Apparel | 37% | £1.78 billion |
| Home & Furniture | 30% | £1.44 billion |
| Tech & Electronics | 20% | £0.96 billion |
| Other | 13% | £0.62 billion |
Category shares are from the supplied SellBuy source pack citing Knight Frank / Retail Economics. Values are calculated against the £4.8 billion current UK C2C market, so the table totals £4.8 billion.
| Platform | AI Search & Matching | Smart Pricing | Secure Payments | Multi-Category Experience |
|---|---|---|---|---|
| SellBuy | Yes | Yes | N/A | Yes |
| eBay | No AI | No | Yes | Yes |
| Facebook Marketplace | No AI | No | No | Yes |
| Vinted | No AI | No | Yes | Mainly Fashion |
| Gumtree | No AI | No | No | Yes |
The UK's leading second-hand platforms already bring scale, trust, liquidity and specialist communities. SellBuy adds an AI entry point above them, helping customers find the right route faster while sending better-informed buyers and sellers into the marketplaces that serve them best.
The UK second-hand economy is growing rapidly. No major marketplace has rebuilt the experience around AI.
200 million items change hands every year, yet no platform makes it easy. SellBuy is the first to use conversational AI to remove the friction entirely.
2030 estimate extrapolated from a £4.8 billion 2025 market at 11.3% annual growth.
Second-hand items change hands in the UK every year.
Estimated savings by UK second-hand buyers in 2024 versus buying new.
Of Britons bought second-hand online in the last year.
Sources cited in the SellBuy slide pack: WRAP Citizen Survey 2024, Statista UK Second-Hand Market Report 2024, WRAP Reuse Report 2024 and YouGov Consumer Tracker 2024.
€25 billion market size and 11.7% annual growth.
$74 billion projected resale market.
$227 billion global secondhand apparel in 2024.
€10.8 billion GMV / €8 billion valuation.
$1.2 billion acquisition.
Billions of listings and huge volume.
Smart pricing guidance from natural item descriptions.
Buyer intent and seller supply connected instantly.
One search across the UK's leading marketplaces.
Consumers can now sell and buy through natural conversation instead of forms, filters and manual comparison.
46% of UK shoppers buy pre-loved at least monthly, and 67% bought second-hand online in the last year.
Users expect simple, fast, guided workflows that work naturally from a phone.
Technology. Experience. Vision. That's the SellBuy advantage.
The future of circular commerce is AI-led by SellBuy: one intelligent place to price, list, search and compare across the UK's fragmented C2C market.
Unlock the value sitting in UK homes.
Help millions buy better.
Power the circular economy by keeping items in use.
Second-hand commerce can become a measurable shift in how the UK consumes.
Buying second-hand can create up to 42% less carbon impact than buying new, giving everyday C2C transactions measurable environmental value.
Every resale extends product life and reduces pressure from raw materials, manufacturing, transport emissions and landfill.
SellBuy can make pre-owned feel guided, trusted and first-choice, so circular buying becomes normal across categories.
Sources cited in the SellBuy slide pack: WRAP Reuse Survey 2024, WRAP Material Flows 2024 and Mintel UK Consumer Attitudes to Sustainability 2024.
The perfect convergence of three powerful trends.
For the first time, consumers can sell and buy using natural conversation instead of complicated forms, filters and listings.
Millions of people are choosing pre-loved goods to save money, reduce waste and make smarter purchasing decisions.
eBay, Facebook Marketplace, Gumtree and Vinted still rely on traditional search, manual comparison and form-based listing flows.
UK MVP, AI listing engine, voice/type interface and cross-marketplace comparison. Focus: user adoption and listing quality.
Affiliate revenue, advertising, upstream prompts and selected later-phase payments/logistics partnerships once traction is proven.
Export the UK playbook into larger European and US second-hand markets with localised AI listing and discovery.
SellBuy is instantly memorable: two words that say exactly what it does. Behind the name is state-of-the-art AI, a conversational engine that speaks to people in plain English, prices items accurately and matches buyers to sellers in seconds.
Every item re-sold is one less item manufactured. Buying second-hand creates up to 42% less carbon impact than buying new. SellBuy makes the circular economy effortless, extending the life of goods already in circulation and building the future marketplace.
Investor, strategic partner, media enquiry or early adopter — we'd love to hear from you.