7 Common GTBuy Spreadsheet Mistakes That Cost You Money
After reviewing hundreds of buyer spreadsheets, we see the same errors over and over. Here are the seven mistakes that silently drain profit and waste time, plus the exact fixes for each.
Mistake 1: Forgetting shipping in cost. Always include all-in cost, not just item price.
Mistake 2: Using text instead of dropdowns for status. Typos break your filters.
Mistake 3: Not backing up the sheet. Google Sheets has version history, but only if you save regularly.
Mistake 4: Overwriting formulas. Lock formula cells with sheet protection.
Mistake 5: Tracking sold items in the same tab. Move them to an Archive sheet.
Mistake 6: Ignoring the Notes column. Three months later you will not remember vendor quirks.
Mistake 7: No profit margin column. Revenue feels good. Profit margin tells the truth.
Fixing Broken Formulas
The most panic-inducing moment is when your profit column shows #VALUE. Usually this means you typed text into a number field. Check for stray spaces, currency symbols inside cells, or commas used as decimal separators. Clean data is the foundation of clean math.
The Backup Rule
Make a duplicate of your master sheet every Monday morning. Name it Backup 2026-05-26. If you accidentally delete half your data on Wednesday, you have a clean copy from two days ago. This sixty-second habit has saved buyers from losing months of tracking history.
Want a template that already avoids all these mistakes? Download our free starter template.
Get Free TemplatesInternal Links: Return to the GTBuy Spreadsheet homepage, explore our complete guide, or start learning in the course hub.