The card currently maintains a healthy market value of $25, driven almost entirely by a massive contingent of passionate casual players and dedicated character collectors
I started with a double deck (120 cards) in Blue/Black, cut it down to normal size (60 cards), and then removed Black
To help fix your three colors you have the on-color shock lands from Ravnica , the check lands from M10 and Innistrad , the slow lands from Midnight Hunt and Crimson Vow , and a cycling land from Amonkhet (other cycling lands are good budget options, more on this below)
You can negotiate on the spot, compare offers between vendors, or sell parts of your collection like bulk rares or commons that online platforms might not take
Card stock thickness matters - fakes are often slightly too thin or too thick