TCGPlayer is good. I'm happy to buy from basically any seller that has more than like 100 sales and positive reviews, enough to know they're established and I'm unlikely to get scammed or anything. The worst that's ever happened to me is it took like a week for a seller to ship something.
A lot of the "humor" in Sperling's article isn't great, but I agree with the gameplay criticisms he makes. Like, what is Play Design doing when they allow a card like Once Upon a Time to be printed? It's about 2/3rds of an Ancient Stirrings, a card on the shortlist of cards Wizards is watching for a potential ban in Modern, but you can also cast the first one for free most of the time? Was there some kind of abandoned idea of printing cards for Standard that are immediately banned in eternal formats? He didn't even mention Emry, a card with Affinity for Artifacts that also more or less draws a card for free every turn.
Even if you're just looking at Standard, after we've suffered through 6 months of obnoxious planeswalkers with too-low mana costs that immediately replace and/or protect themselves and punish you for doing most game actions, we're gifted with Oko, who not only deals with any problem creature or artifact as a + ability but is also nearly impossible to remove due to his starting loyalty. They even knew that the planeswalkers were a problem as evidenced by the ability soup on Questing Beast, which, by the way, can't even kill Oko! Why print an over the top planeswalker hate card that can't even deal with the planeswalkers in the same set? I guess I saw Melissa DeTora mentioned in her dev diary post for War of the Spark that they intentionally put powerful effects on cheap planeswalkers like Narset, cards that they know are typically hard to remove in a profitable way, so I'm not even sure why I would expect them to learn a lesson here.
I want "The Kind of Old Spell," 1+R/B, Destroy target planeswalker. (New line for separate abilities, don't want to get passive punked by Narset.) Draw a card.