Bol.com not working anymore sadly.
The plugin facilitates integration with major e-commerce websites like Bol
com, Coolblue, Wehkamp, Ikea, Praxis, and others
It allows users to compare products and find better deals by displaying the availability of similar products on Marktplaats
nl, the largest classifieds site in the Netherlands
The plugin also provides easy access to search results on Marktplaats
nl directly from the product pages of the supported webshops