You can also look at completed listings to get an idea of what a card has sold for recently
Discarding an island is just much more difficult than discarding a blue card, especially with greedy mana bases, but its still doable
Are Hounds Considered Dogs in MTG

Modern Horizons 2 Timeshifts Price GuideMarket prices in USD for Modern Horizons 2 Timeshifts cards (Magic: The Gathering), tracked on TCG Stacked and updated regularly.All Modern Horizons 2 Timeshifts cardsMost valuable Magic: The Gathering cardsTotal set value$267.58Cards16Most valuable cards in Modern Horizons 2 Timeshifts1Ragavan, Nimble Pilferer$71.56mythic2Esper Sentinel$64.49rare3Solitude$47.70mythic4Endurance$22.82mythic5Subtlety$21.53mythic6Fury$11.01mythic7Grief$10.28mythic8Dress Down$6.17rare9Dragon's Rage Channeler$3.95uncommon10Tireless Provisioner$3.26uncommonCard prices for Modern Horizons 2 TimeshiftsCard prices for Modern Horizons 2 Timeshifts#CardRarityMarket Price1Abiding Graceuncommon$0.302Esper Sentinelrare$64.493Solitudemythic$47.704Dress Downrare$6.175Hard Evidencecommon$0.456Subtletymythic$21.537Griefmythic$10.288Sling-Gang Lieutenantuncommon$0.389Dragon's Rage Channeleruncommon$3.9510Furymythic$11.0111Ragavan, Nimble Pilferermythic$71.5612Strike It Richuncommon$2.6413Unholy Heatcommon$0.6814Endurancemythic$22.8215Tireless Provisioneruncommon$3.2616Munitions Expertuncommon$0.36

But if the game goes just long enough, Midrange is very good at becoming the deck everyone suddenly realizes they should have dealt with five turns ago
While these might look very similar to forcing a block in terms of removal, there are a few key differences