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Download the Become.com Price Comparison plugin from our store https://nop-station.com/customer/downloadableproducts
Go to Administration > Configuration > Local plugins.
Upload the Feed.Become zip file using the "Upload plugin or theme" button
Go to Administration, reload the 'list of plugins'. Install 'Become.com Price Comparison'
To make the plugins functional, restart the application.
Edit the plugin details with 'Edit' option.

Go to Administration > Configuration > Local plugins. Find the Become.com plugin and click on Configure to go to the plugin configuration page.
Set the size in pixels for product thumbnail images in Product thumbnail image size field
Select the currency that will be used to generate the feed from Currency field
Click Save to save the current configuration.
Click the Generate Feed button to generate the price comparison feed
Click the Click here link to download the CSV file

Become.com price Comparison Service Plugin Documentation