Currently, only two cards have managed to make it past the $100 value, and they are both Greninja ex cards

3 Black Widow, Double Agent Bloodthirsty Conqueror Blooming Stinger Boggart Cursecrafter Bone-Cairn Butcher Burrog Banemaker Cackling Slasher Canyon Crawler Case of the Gorgon's Kiss Cecil, Dark Knight Cloak and Dagger, Entwined Coalstoke Gearhulk Coerced to Kill Crossbones, Malicious Mercenary Crossway Troublemakers Daggerfang Duo Dark Leo & Shredder Death Baron Deathcap Marionette Derelict Attic // Widow's Walk Derelict Attic // Widow's Walk Dissection Tools Dragon Sniper Dreadwing Scavenger Egrix the Bile Bulwark Engine Rat Entropic Battlecruiser Etrata, Deadly Fugitive Fateweaver Fear of the Dark Feral Deathgorger Flesh Burrower Frog Butler Fynn, the Fangbearer Fynn, the Fangbearer Gastal Thrillseeker Glarb, Calamity's Augur Gran Pulse Ochu Grasping Shadows Gravblade Heavy Green Goblin, Revenant Gutless Plunderer Gwenom, Remorseless Haunted Hellride Hazardroot Herbalist Horrid Vigor Hullcarver Hunter's Blowgun Huskburster Swarm Judith, Carnage Connoisseur Locke Cole Luminollusk Madame Null, Power Broker Mardu Siegebreaker Marshal of the Lost Maximum Overdrive Moonstone Harbinger Nightblade Brigade Ninja of the Hand

Speaking of help, the commander we choose to play here can make a huge impact on how we build around the Keruga restriction
Ease of expansion Its great to have a cool box that fits all your cards in, but what about when you accidentally acquire a bunch more and now your box is overflowing