Mid-tier cards (#510) have experienced more volatility, with some corrections from launch highs
Then price it on recent sold comps for that exact card and grade, not asking prices
And some PNG previews of Gemmon
BT16-061 U Digimon Lv.5 DoruGreymon Color Black Purple Cost 7 DP 7000 Digivolve Cost 1 BlackPurple 4 from Lv.4 Form Ultimate Attribute Data Type Beast Dragon/X Antibody/SoC Card Text 1 [Special Digivolution Condition] [Digivolve] Lv.4 w/[Dorugamon] in name or w/[SoC] trait: Cost 3 [Effect] Collision (During this Digimon's attack, all of your opponent's Digimon gain Blocker, and the opponent blocks if able.) [All Turns] When an attack target is switched, this Digimon with an [SoC] trait Tamer card in its digivolution cards may digivolve into a Digimon card with the [Beast Dragon], [Undead] or [SoC] trait in the hand without paying the cost
Dreamdew Entrancer is a machine, especially if you want to bounce your creatures
For the cards you're looking for to complete the missions, you could be spending anywhere between 70 and 2500 Pack Points per card