Ebay is pre-dominantly an e-commerce website with an added advantage of auctioning! The below article provides a list of 13 major retailers who accepts bitcoin for their products and services.

https://www.lifewire.com/big-sites-that-accept-bitcoin-payments-3485965

Also, Shopify (already mentioned in the list above) is a great new exciting name to enter this crypto space. All website owners in Shopify platform can now add bitcoin as one of their payment methods which has the potential to take bitcoin adoption to the next level. Because around 50k active stores are running under Shopify platform with around 40 billion USD worth of sales volume yearly.

Hope this helps!