THRIFTYFLIPPER

Free Arbitrage Profit & ROI Calculator PRO

Free arbitrage calculator Specialist Guide

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Flipper's Knowledge Bank

ROI = (Net Profit / Item Cost) * 100. Target at least 100% ROI for smaller items to account for your time and shipping overhead.

Don't forget Promoted Listings (variable) and International Shipping fees. This calculator defaults to standard eBay fees to stay conservative.

Always weigh your package after packing. Round up to the nearest ounce. One mistake in weight can wipe out 20% of your profit.

Scanning here opens Sold Listings. Ignore the white prices; look for green numbers.

Tip: If an item has 10 listed but 50 sold in the last month, it's a fast mover (High Sell-Through Rate).

What is a good sell-through rate?

A sell-through rate (STR) measures how fast items sell. A good rule of thumb for beginners is to look for items with at least a 50% STR, meaning there are as many sold listings as active listings in the last 90 days.

How to check eBay comps?

  1. Filter by "Sold Items" and "Completed Items".
  2. Sort by "Recent" to see the current market value.
  3. Ignore active prices; only sold prices matter.

Essentials for beginners?

  • Polymailers: Cheap and great for clothing.
  • Bubble Wrap: Essential for breakables.
  • Shipping Tape: Don't use regular scotch tape.

How to weigh packages?

Always weigh your package after it is fully packed. Use a digital scale and round up. Incorrect weights lead to postage adjustments.

What does BOLO mean?

BOLO stands for "Be On The Look Out". It refers to items or brands that are currently high-profit or fast-selling.

Best places to source?

  • Thrift Stores (Goodwill, Savers)
  • Garage/Yard Sales (Lowest prices)
  • Estate Sales (High quality vintage)
  • Media Mail: Cheapest for Books, CDs, DVDs.
  • PirateShip: Never pay post office retail. Use PirateShip.com for commercial rates.
  • Poly Mailers: Don't box clothing. Bag it to keep weight under 1lb.

When scanning books, always check Amazon. Look at the "Best Sellers Rank".


Rule of Thumb:

  • Rank under 1,000,000 = Sells eventually.
  • Rank under 100,000 = Sells very fast.

The Google button is your safety net. Use it to check Retail Prices. If you find a "rare" toy for $10, check Google to make sure Target isn't selling it brand new for $12.

  • UPC-A & UPC-E (Standard Retail)
  • EAN-13 & EAN-8 (International)
  • ISBN (Books & Media)

© 2026 ThriftyFlipper. Global Arbitrage Scout.

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Free Arbitrage Profit & ROI Calculator

Stop guessing at your margins. In 2026, the Free Arbitrage Calculator by Thrifty Flipper is your tactical hub for protecting your profit. While other tools rely on internal databases that can be wrong or out-of-date, our calculator is part of a Point, Shoot, Go portal that takes you directly to the source. Scan an item's barcode and instantly bridge to eBay Sold Listings, Amazon, Etsy, Google Lens, Mercari, and Poshmark. You get the real, live data from the marketplaces themselves, allowing you to plug accurate numbers into your calculations every single time.

We believe in the power of "Rapid Fire" research. Our workflow is optimized so that you can scan, check the major markets, and hit the back button for the next item in record time. This manual-but-fast approach is the professional way to source in 2026, using our ebay fee calculator to protect your margins while remaining completely free and ad-supported. We don't believe in "pay-to-play"—we believe in leveling the playing field for every independent reseller. Our tool gives you the professional speed of a paid suite without the overhead, letting you keep every dollar of your hard-earned profit.

We've also built in total flexibility for any sourcing environment. If an item doesn't have a barcode or it's too damaged to scan, our Manual Entry system lets you type in the item name or barcode number to get the same lightning-fast marketplace comparisons. No item is left un-researched. We focus on the core essentials: speed, simplicity, and accuracy. It's the ultimate all-in-one portal for the modern arbitrageur who wants to stay lean and profitable.

Pro Tip: For better results, pair this guide with our ebay arbitrage tool and reseller scanner to master your workflow.

Expert Scouting Guide

Mastering the Margin in 2026

Reselling success isn't about what you sell it for; it's about what you keep. In 2026, shipping costs and platform fees are the primary margin killers. Our calculator portal encourages you to check the Live Marketplace Data for every flip. By seeing the actual competition and current shipping trends on the source sites, you can make smarter decisions about how to price your inventory. This is the free alternative to the status quo, giving you high-stakes speed and professional-level accuracy without the professional-level price tag. We believe that the best data comes directly from the sites themselves, and our app is the fastest way to get there.

We've kept the experience simple and focused. No unnecessary records to manage, no weight to slow you down. Using our reseller scanner alongside this calculator means you spend your time finding inventory, not managing a software interface. It's the "Point, Shoot, Go" mentality applied to your entire sourcing business. High speed, high accuracy, zero cost.

We've designed the interface to be frictionless. No unnecessary record-keeping or account management—just the info you need when you're standing in front of the inventory. This "Lightweight" approach is why serious resellers are switching to Thrifty Flipper. We prioritize your time because every second saved is another item you can research.

The Free Alternative for Pro Resellers

Thrifty Flipper is build to empower the next generation of entrepreneurs. We've made our tool available as a web portal or as a direct download from the Google Play Store, ensuring you have access to the best data wherever you source. Our ad-supported model ensures that we stay free forever, allowing you to reinvest your software savings back into your business. In 2026, the leanest resellers are the ones who thrive, and we're here to give you the tools to stay fast and profitable.

Join the reselling revolution and share this tool with your fellow flippers using the Share button. The more we share our knowledge and our tactical speed, the stronger our community becomes. Whether you're hitting retail clearance or garage sales, our arbitrage calculator portal is the only companion you need to find the profit in every scan. Point, shoot, and go find your next winner today.

Remember: Speed is profit. Stay fast with the Thrifty Flipper portal.

Pro Tip: For better results, pair this guide with our ebay arbitrage tool and reseller scanner to master your workflow.

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