Several factors influence Team Rocket card values: card condition (mint cards worth 3-5x more), rarity (holographic and rare cards command higher prices), first edition status, PSA/BGS grading scores, and market demand for specific Pokemon
Of course, the floor on Bitterbloom Bearer is lower than Bitterblossom simply because its vulnerable to traditional removal spells
You might be aware of some of the more infamous pieces, like Brainstorm
Loot has an upkeep trigger to exile can cast that turn cards from your library equal all nonland card types I control, but not themself
but I feel like for some color combinations to compete with the raw value in Green, its becoming more and more acceptable for them to be playing cards like Mana Vault, Mana Crypt, and Grim Monolith
Arixmethes's effect causing it to be a land overwrites any earlier effects that gave it additional types