I've once heard about decentralized alternatives to eBay and Amazon where you can buy/sell items online without middleman. OpenBazaar and Parcl are among several alternatives aiming to transform e-commerce. While they've gathered a lot of attention within their early days, it seems the concept of a "decentralized marketplace" is fading away as the industry shifts into "meme" coins and NFTs.
Which Parcl are we talking about? Mind giving link? I know of one which is about speculating on real estate prices, not a decentralized marketplace.
..I haven't seen a marketplace based on smart contracts yet. Would you imagine developers doing something like this? If they launch a decentralized marketplace on the Ethereum blockchain, it will be truly-unstoppable.
Ethereum fees can be killer, will demotivate people from using it.