If you want to support creators but also need to watch your budget, signing up for deck artists’ newsletters can help, they usually send out 15-20% discount codes when they launch new decks. Or, better yet, make sure you’re on the Tarot Guru emails and you’ll get alerts for various creators from the newsletter.
You might want to check out threads like the cheap Tarot decks or popular Tarot cards because readers like @Sploots will share some links to good deals for decks there.