I got interested in flipping recently but refused to pay $$$ for price checker apps.
So I spent the weekend building my own alternative: ThriftyFlipper.com
It scans barcodes and instantly and lets you check the 'Big 5' simultaneously: eBay Sold, Amazon, Mercari, Poshmark, and Google Lens.
No sign-up, no email required.
The catch? I added a small bottom banner and a 'server cost' popup that shows once every 50 scans (so basically only for power users). That pays for the hosting so I can keep it free forever.
Would love for you guys to break it and let me know if you find bugs!