What is Opensea?

OpenSea.io is the first and largest peer-to-peer marketplace for crypto-goods (like an eBay for crypto assets), which include collectibles, gaming items, and other virtual goods backed by the blockchain. On OpenSea, anyone can buy or sell these items through the use of smart contracts.

OpenSea.io does a great job at providing consumers with metric information about NFT collections. They provide

information such as the confidence scores, the creation date, offers, and volume of sales. This helps consumers to make informed decisions when purchasing NFTs.

An example of an NFT listing on Opensea

A price history is displayed under the current highest offer, along with a list of previous offers and their timestamps.