I'd recommend starting with something like collx.app to scan the cards and get a rough sense of value. If it's past your threshold (say $50) then you can look into the pricing history a bit more. The best tools for that would probably 130point.com and cardboard.market. 130 point lets you search past ebay sales and you can get a sense of card value using that. Cardboard market lets you do that + look at the prices... Source: about 1 year ago

You can use a tool like collx.app to scan each card and check how much they're selling for. If you want to look at graded copies for each card you can use cardboard.market to search up the card + the grade and see sold listings and also cards for sale to see where people are pricing. Source: about 1 year ago

I started using CollX, an app to helps me figure out how much my trading cards are worth. You should get it, too! Check out my collection and add yours. Use my referral code, NZ3SY, when signing up. http://collx.app. Source: about 2 years ago

Stage 2 of the Mars Genesis project! => https://marsgenesis.com/ Every owner of a Mars card access a martian in 3D to start the battle of Mars. They just dropped the first draft of the martians on their discord channel. Source: almost 3 years ago

Welcome to Mars Genesis! We are the first NFT collection about Mars and passive income NFT ever created! This post contains all the helpful information about the project that you should read before getting started. Source: almost 3 years ago