When you open a page with a particular product click on the extension icon, data will be stored in a table row, after that click on copy and your information is ready to be pasted in a spreadsheet.
Working on smile.amazon.com, www.amazon.com, amazon.ca for now. With version 1.1.6 adjusted to European websites. Currently supporting amazon.it, amazon.fr, amazon.co.uk, amazon.es.
If you find a bug please report it.
If you want to collect all the sellers and their prices for a specific product you can try my other extension "Amazon Harvest - Collect Sellers"
If you want to support me, or you have suggestions or need to make the extension suitable for you, feel free to contact me at firstname.lastname@example.org
Looking forward to your comments!