TCGPlayer Seller Aggregation Voldrix מאת

a "add to virtual cart" button is added to every product page.
Click on the browser extension, and click aggregate to get the list of most common merchants amongst your card selection.
Also shows the merchant price, and the minimum price amongst all merchants (excluding damaged quality cards).

Once you add cards to your cart through the extension, you may need to refresh the page to see them show up.