Content of the article
If you want to filter products/posts only by taxonomies and price - you can do it fast, after installing of the plugin you can use it. BUT you should make only one thing as you want filter by price too.
- create new filter-category
- add filter price under this filter-category and save it
- reflect it to _price key as on screen above and press save
- go to the plugin settings on the same bottom of the page enter your filter-category ID and select post slug
- press "Assign"
That is all, drop the widget somewhere and use it.
If you have multi-vendor shop and you want to automate this procedure: http://wp-filter.com/howto/how-automatically-enter-the-meta_data_filter_cat-when-an-user-inserts-a-new-article/