pokemon cards pack of 10 – Journey Together – Single Booster – – Pack Art May Vary : Toys & Games after characters in pristine Crown Kings - Pokemon Mystery

Specifically, it seems like a card from the soon-to-release set MTG Foundations is driving the spike

Kolodin, Triumph Caster Kolodin, Triumph Caster is a dream come true for vehicle and mount decks

Series 1 released on March 30th and featured Kanto, Sinnoh, and Alola: Series 3 will presumably release in September and contain the final Starter Pokemon from Hoenn, Kalos, and Paldea.

Terrasymbiosis - A powerful +1/+1 counters engine

Whether you're an avid player or a passionate collector, Soft Sleeves are an essential accessory to ensure your valuables remain in mint condition.

As for the card prices, you may be able to put some extra dollars/pounds onto the prices shown when selling them but they are not massively rare cards so I would personally advise not to sell them for too much