OnBuy logoOnBuyvseBay UK

Which marketplace is better for sellers?

Last updated: March 2026

Quick Verdict

eBay UK is the established choice with a massive buyer base and proven track record. OnBuy is the most seller-friendly UK marketplace with lower fees and a commitment to never competing with its own sellers. eBay is essential for reach; OnBuy is the best emerging alternative for sellers frustrated with eBay's fees and policies.

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Scoring Breakdown

Buyer Base

OnBuy5/10
eBay UK10/10

eBay UK has millions of active buyers and is one of the most visited e-commerce sites in the UK. OnBuy has grown rapidly to 8M+ registered buyers but is still much smaller.

Seller Fees

OnBuy9/10
eBay UK6/10

OnBuy charges significantly lower fees: 5-9% commission with no listing fees or monthly subscription for basic sellers. eBay charges final value fees of 10-12.8% plus per-listing fees on the basic plan.

Seller Treatment

OnBuy10/10
eBay UK5/10

OnBuy is explicitly pro-seller: no private-label competition, transparent policies, and responsive support. eBay has faced criticism for buyer-favoring dispute resolution and increasing fees.

Trust & Recognition

OnBuy5/10
eBay UK10/10

eBay is a household name with decades of brand trust. OnBuy is growing in recognition but many UK consumers still haven't heard of it.

OnBuy logoOnBuy: Pros & Cons

Pros

  • Lowest fees of any major UK marketplace (5-9%)
  • Never competes with its own sellers
  • No listing fees on basic plan
  • Transparent, seller-friendly policies
  • Growing rapidly — 8M+ registered buyers
  • PayPal and Stripe payment options
  • Dedicated seller support

Cons

  • Much smaller buyer base than eBay
  • Lower brand recognition
  • UK-only market
  • Less mature seller tools
  • Fewer product categories fully developed
  • Less traffic means slower initial sales

eBay UK: Pros & Cons

Pros

  • Massive UK buyer base — millions active
  • Household brand recognition
  • Strong in all categories including used goods
  • Mature seller tools and analytics
  • eBay Ads for promoted listings
  • Global reach beyond UK
  • Established shipping integrations

Cons

  • Higher fees (10-12.8% final value)
  • Buyer-favoring dispute resolution
  • eBay competes with sellers via managed payments
  • Complex fee structure with many add-ons
  • Declining seller satisfaction
  • Listing fees apply on basic plans

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