In order of sales with approximated current prices:
Liliana, Heretical Healer $25.50
Exquisite Firecraft $3.50
Chandra, Fire of Kaladesh $10.25
Pia and Kiran Nalaar $1
Goblin Piledriver $12
Managorger Hydra $3
Gilt-Leaf Winnower $1.75
Thopter Spy Network $2.50
Sword of the Animist $4
Gaea's Revenge $0.75
Exquisite Firecraft is going to be the next Stoke the Flames, or so people think. It's often going to be an uncounterable 4 damage. Red mages have to love that. But at three mana and no way to lower its mana cost like you can with the Convoke mechanic of Stoke the Flames, it's going to be at the top of the curve in Red Deck Wins. But 4 damage is 4 damage, even at Sorcery speed.
Chandra seems to have tons of casual interest, although she has her fans in the Constructed arena as well. It's true that if she deals combat damage, a red spell is played, then she taps to deal a damage, another red spell is played, she taps again deals 1 damage, she flips. The flip side is decent enough. The question is will her payoff be worth it? A lot of people seem happy to buy in at $10 to find out.
Pia and Kiran Nalaar doesn't look exciting, but the flavor of having Chandra's parents as a playable Legendary Creature is probably what's driving her sales. Her possibility for inclusion in a deck that plays Feldon of the Third Path is a strong possibility. If Pia and Kiran are in the graveyard, Feldon's ability can make a token that makes the two 1/1 thopters. Her ability to sacrifice an artifact to deal 2 damage to a creature or player seems a bit inefficient to Constructed players. But in Commander, there may be some infinite combo that could work with them. Just from a pure card advantage standpoint, though, 3 bodies for one card is just good.
Managorger Hydra we've discussed previously. It's a trampling fuctionally-better Taurean Mauler.
Gilt-Leaf Winnower could come out of nowhere to be a really important card in Standard. Its unusual removal ability, hitting creatures that have uneven power and toughness, could come very much in handy in Green/Black Elves and Mono-Black. It's not currently priced like a bulk rare as some people think it might be, but it just seems too good not to be.
Thopter Spy Network is getting eaten up like crazy. It's probably too slow for Constructed, but oh wow it can do some major work in Commander. A free creature and a free card every turn is pretty good, so maybe it really will work in Standard. It's a wait and see card priced like a complementary Constructed piece.
Sword of the Animist is really good. It can help you ramp like crazy. It's probably going to shine most in Commmander as it doesn't seem to be a game-breaking Equipment that will do much in Constructed. It's still a sweet card that can offer outrageous value.
People seem to really like Gaea's Revenge. It's pretty dumb in Limited as only a rare. It could be a top-end finisher in Mono-Green Devotion. It's hard to remove, and it has haste with 8 power. This is a card that has to be dealt with. It's a card that used to be a mythic rare, and now that supply is up, it's going to sell.
Sigil of the Empty Throne $0.75
Jace, Vryn's Prodigy $16
Kytheon, Hero of Akros $14.50
Alhamarret's Archive $3
Hangarback Walker $2.50
Dwynen, Gilt-Leaf Daen $2.50
Sigil of the Empty Throne is a popular card that has been mostly a casual favorite, but has shown up in Modern as well. But since you never need a full playset, the price has dropped considerably since its reprint. The demand is definitely there at under a dollar.
Being such a popular planeswalker, it's not that surprising to see Jace, Vryn's Prodigy selling on Amazon. He's a glorified Merfolk Looter, though, and his flip side doesn't appear overwhelmingly awesome. His plus ability is meh. Still, his minus ability is Snapcaster, albeit at sorcery speed. The ultimate is a nice part to have as part of a mill strategy. There's enough demand for his price to keep ticking up. The question is if it will last.
Kytheon is a one-drop Planeswalker. Seriously. But will there be a deck that will win with him? I think so. He should start selling a lot better than this soon.
Alhamarret's Archive should be a sweet card in Commander. Casual players will gobble it up too, because it gives you double lifegain and double the cards for any cards you draw outside your draw step. It's pure value that can be splashed in any colors. The demand here makes sense.
Hangarback Walker can get really dumb if you can double the +1/+1 counters on him. There are plenty of ways to do this in Commander. It's not hard in that format to create a lot of 1/1 Thopters that upon entering the battlefield do dumb things. There's potential here, and the casual demand alone is driving him over $2.
Even though there are so many good Elf Lords, Dwynen may well see Standard play. I like her. There are better options in Eternal formats, but she'll see Commander play. And Magic players just love their Elves. Swing with an Elf army and gain a ton of life?
Yeah, your opponent was probably dead anyway, but if they weren't, they won't catch you easily.
all creatures -4/-4. That means anything with 5 or more toughness gets really good because it lives. The casual crowd probably
doesn't want to spend $10 on it, but to be fair, Languish's price on Amazon lagged behind the sudden spikes this card has made.
Key takeaways here:
Competitive and casual players alike are snapping up Liliana, Heretical Healers, Exquisite Firecrafts, Managorger Hydras, and Goblin Piledrivers. As they should be. Pia and Kiran Nalaar are REALLY popular. Despite being an intro pack rare, they're selling extremely well as single cards. With their foil over $4, it seems that while this card looks underwhelming, the Nalaars probably better than a lot of us think. Their daughter is doing really well, too. So there's a lot of confidence in this family.
Gilt-Leaf Winnower and Thopter Spy Network may do some things and people are happy to buy them up in droves. I think Winnower is going to see more Constructed play than the Network long-term.
The Archive, the Walker, and Dwynen are all cards driving considerable interest. Sword of the Animist is just a cool card, and people want it. I doubt any of them are going to be worth much of anything.
Languish's price is going up, and depending on just how massively it changes Standard (and perhaps even Modern), it may keep going up.
As we're seeing, tracking Amazon's Best Sellers can give you an idea of just what people outside of the competitive scene are looking to grab. Amazon and its affiliated sellers have provided us a great service by giving us a new research tool at identifying cards that have real interest.