SureBuy.io: Smarter Marketplace Buying, Powered by AI

Buying secondhand should save you money — not cause stress. SureBuy.io helps you avoid scams, overpriced items, and shady sellers across all major resale platforms, including Facebook Marketplace, Craigslist, OfferUp, Mercari, TikTok Shop, and more. If it feels too good to be true, we'll help you check before you buy.

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The Problem We Solve

Most resale platforms weren't built with buyer protection in mind.

  • Scammers can easily pose as real sellers.
  • Listings are often vague, overpriced, or misleading.
  • There's no built-in way to check for red flags or price fairness.

SureBuy.io is your independent buyer safety tool.

We help you evaluate secondhand listings before you waste time, money, or peace of mind — no matter which marketplace you're using.

How SureBuy Works

SureBuy.io gives you instant insight in 3 simple steps:

1. Paste any listing or seller message

From Facebook Marketplace, Craigslist, OfferUp, Mercari, TikTok Shop — anywhere. Just copy and paste the text.

2. Get AI-powered feedback

Our tool analyzes scams, red flags, seller behavior, pricing accuracy, and negotiation tips — in seconds.

3. Shop smarter

Avoid bad deals. Spot shady listings. Know the fair price before you commit.

Try it free. No login or credit card required.

Who We Are

SureBuy.io was built by a small team of experienced marketplace buyers who were tired of the risks that come with peer-to-peer shopping. After years of dealing with scams, ghosted messages, and overpriced items, we created a tool to protect buyers like us.

We're not a marketplace. We don't list products. We don't represent sellers. We're here for one reason: to help buyers make better decisions.

What We Believe

Every buyer deserves backup.

Marketplace platforms protect sellers — SureBuy.io gives buyers the tools they've been missing.

Your data stays yours.

We never track, sell, or share your data. You don't even need to create an account to use our scan tool.

No bias. No ads. No noise.

We don't promote listings or sellers. Our results are unbiased and designed to help you, not anyone else.

Ready to Shop Smarter?

Whether you're browsing Facebook Marketplace, negotiating on OfferUp, or flipping finds from Craigslist or Mercari — SureBuy.io helps you spot the good deals and avoid the bad ones.

Start a free scan today. No sign-up. No payment. No pressure. Just real help, before you buy.

Start Free Scan

Frequently Asked Questions

Yes — it's completely free to try. You can scan resale listings without logging in or entering a credit card.

SureBuy works with any resale marketplace where you can copy and paste the listing text or seller message. This includes Facebook Marketplace, Craigslist, OfferUp, Mercari, Poshmark, TikTok Shop, and more.

We use advanced AI to analyze each listing or message for scam signals, shady seller language, pricing inconsistencies, and negotiation insights. You'll get a fast, plain-English breakdown before you commit to anything.

No. SureBuy.io is 100% independent. We are not affiliated with Facebook, Craigslist, OfferUp, or any other resale platform. That means we're only focused on helping buyers — not promoting or protecting sellers.

SureBuy.io was created by a small team of resale enthusiasts who saw too many buyers get burned. We're building the tool we always wished existed — fast, honest, and made just for buyers.