Cheapest priced copy (Time Spiral Remastered): $0.69 at Card Kingdom, near mint, their price list as of .
Snapback 
Instant · Common · Time Spiral · #78
You may exile a blue card from your hand rather than pay this spell's mana cost.
Return target creature to its owner's hand.
Legal inCommanderModernLegacyVintagePauper
Not legal inBrawlStandardPioneer
2 printings · $0.69 to $199.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Time Spiral | 78 | Common | $0.79 | $199.99 |
| Time Spiral Remastered | 87 | Common | $0.69 | $69.99 |
One ruling from Wizards of the Coast
- 19 March 2021To determine the total cost of a spell, start with the mana cost or alternative cost you're paying (such as the alternative cost of Snapback), add any cost increases, then apply any cost reductions. The mana value of the spell is determined by only its mana cost, no matter what the total cost to cast that spell was.