While this is a bad practice in principle because youll almost always get less value from your cards than what you probably paid, it's the only way to get tix credit to then spend towards new cards
Outside of the somewhat meh Flare of Cultivation each of these can be played at instant speed and offers incredible utility
Its worse that Time Warp recursion or Time Vault with Voltaic Key junk because those actually win the game with something resembling real game speed
It required a different structure that wasn't suitable for the rest of the set
Meanwhile, cards from the Beta and Unlimited sets, though slightly more common, remain highly collectible as well, often reaching thousands in value depending on condition
With newer sets like Destined Rivals harkening back to the good old days of Team Rocket, Dark Pokemon from the set have seen their values increase