Yes, it does work to sell codes to list your items at eBay Amazon Walmart or google stores. As GS1 is leasing barcodes and don’t have all codes in their custody. Some companies already owns before this company in 2002 and then law suit for those prefix allow to sell them as well.
Make it easy we suggest to buy and start selling from cheap seller who gives guarantee for your products and timely full support from https://codesforamazon.com/product-category/barcodes/upc-barcodes/
Conclusion: yes you can buy and start selling your products under your brand name if its not yet registered with amazon and buy the cheapest Available Numbers with any genuine Price match guarantee as well from codesforamazon.com
CategoryEAN UPC ISBN BARCODES