Looking for some help finding an appropriate app.
Next step for my store is to upload our full product listing, which is more than 600,000 products.
This entire list needs to be reviewed for price each month.
Ideally I'd be able to download a spreadsheet of products filtered by vendor, work changes in Excel, then upload the changes which will overwrite/update what's on the store (not create new items).
The standard import/export functionality doesn't work because of the way multiple images create multiple lines, and also I've found you can only work with about 5000 products at a time.