From the Add Products hub in GoSellerGo (menu: Add New Products) you can add your own offer to products already in the Amazon catalog.
Single add
Enter a single ASIN; catalog info, Buy Box price and a fee breakdown are shown live. Choose FBA or FBM, enter quantity and price, then push to Amazon.
Bulk add
Select the store, paste a list of ASINs, or upload a CSV in the form ASIN, FBA/FBM, quantity, price. In the review table you can bulk-select FBA/FBM, bulk-apply quantity/price, and use the Buy Box price with one click. There are three actions: push to Amazon, add to inventory only, or add to watchlist.
Missing required info
Amazon may require extra fields in some categories (e.g. dangerous goods declaration). In that case no error is printed; GoSellerGo shows a dynamic form — just fill in the fields and publishing is retried automatically.