Cheapest priced copy (Modern Masters 2017): $19.99 at Card Kingdom, near mint, their price list as of .
Snapcaster Mage 
Creature — Human Wizard · 2/1 · Rare · Innistrad · #78
Flash
When this creature enters, target instant or sorcery card in your graveyard gains flashback until end of turn. The flashback cost is equal to its mana cost. (You may cast that card from your graveyard for its flashback cost. Then exile it.)
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
10 printings · $19.99 to $3199.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Final Fantasy Commander | 469 | Mythic | — | $179.99 |
| Innistrad Remastered | 478 | Mythic | $20.99 | $49.99 |
| Innistrad | 78 | Rare | $20.99 | $69.99 |
| Modern Masters 2017 | 50 | Mythic | $19.99 | $34.99 |
| The List | ISD-78 | Rare | $20.99 | — |
| Pro Tour Promos | 2016 | Mythic | — | $37.99 |
| Regional Championship Qualifiers 2023 | 2 | Mythic | $54.99 | $899.99 |
| Ultimate Box Topper | U5 | Mythic | — | $49.99 |
| Secret Lair Drop (Encore Electromancer) | 808 | Mythic | $2899.99Out of stock | $3199.99Out of stock |
| Ultimate Masters | 71 | Mythic | $20.99 | $29.99 |
11 rulings from Wizards of the Coast
- 6 June 2025If a split card gains flashback, you pay only the cost of the half you're casting.
- 6 June 2025You must still follow any timing restrictions and permissions, including those based on the card's type. For instance, you can cast a sorcery using flashback only when you could normally cast a sorcery.
- 6 June 2025If you cast a spell with flashback, you can't pay any alternative costs such as overload costs. You can pay additional costs such as kicker costs. If the spell has any mandatory additional costs, you must pay those to cast the spell with flashback.
- 6 June 2025If you cast an instant or sorcery with {X} in its mana cost this way, you still choose the value of X as part of casting the spell and pay that cost.
- 6 June 2025If a card with no mana cost gains flashback, it has no flashback cost. It can't be cast this way.
- 6 June 2025You can cast a spell using flashback even if it was somehow put into your graveyard without having been cast.
- 6 June 2025A spell cast using flashback will always be exiled afterward, whether it resolves, is countered, or leaves the stack in some other way.
- 6 June 2025To determine the total cost of a spell, start with the mana cost or alternative cost (such as a flashback cost) you're paying, add any cost increases, then apply any cost reductions. The mana value of the spell is determined only by its mana cost, no matter what the total cost to cast the spell was.
- 6 June 2025If a card with flashback is put into your graveyard during your turn, you can cast it if it's legal to do so before any other player can take any actions.
- 6 June 2025"Flashback [cost]" means "You may cast this card from your graveyard if the resulting spell is an instant or sorcery spell by paying [cost] rather than paying its mana cost" and "If the flashback cost was paid, exile this card instead of putting it anywhere else any time it would leave the stack."
- 6 June 2025If a card has multiple instances of flashback, you may choose any of its flashback costs to pay.