Selling items online for bitcoin or crypto is not already new because i am also one of the people who buys items online using my cryptocurrency like bitcoin but only on trusted online shop.
I can see that most of the online stores are accepting bitcoin for shopping in their store, and I think that there are very little number of shops who may be giving opportunity to people to use Etherium or other altcoin for shopping there. There I think that in current tie bitcoin is the best option for people to use for shopping online.