One Piece TCG prices follow a predictable pattern: Pre-release / launch week: Prices peak - often $140$175 for popular sets Weeks 26: Prices stabilize as more product reaches retail Months 23: Prices normalize toward or below MSRP on TCGPlayer 6+ months post-release: Prices are determined by set power - strong sets hold or appreciate
A PSA 10 copy is extremely rare because early printing technology often resulted in small imperfections
Other than including Phyrexian and artifact creatures, its not immediately obvious how to build around him
Prosper, Tome-Bound and Misfortune Teller are a couple of Warlocks that have a form of evasion while also having some relevant abilities
To put that in perspective, the pull rate for a single Mega Hyper Rare in recent sets has been estimated at around 1 in 1,786 packs, or roughly 0.06%
Fetchlands are so universally popular that Gogo has a good chance of being run in many blue decks for that interaction alone, those without green in particular