Cheapest priced copy (Kamigawa: Neon Dynasty): $0.49 at Card Kingdom, near mint, their price list as of .
Scrap Welder 
Creature — Goblin Artificer · 3/3 · Rare · Kamigawa: Neon Dynasty Promos · #159p
{T}, Sacrifice an artifact with mana value X: Return target artifact card with mana value less than X from your graveyard to the battlefield. It gains haste until end of turn.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
5 printings · $0.49 to $0.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Kamigawa: Neon Dynasty | 159 | Rare | $0.49 | $0.49 |
| Kamigawa: Neon Dynasty | 388 | Rare | $0.49 | $0.99 |
| Kamigawa: Neon Dynasty | 471 | Rare | $0.49 | $0.49 |
| Kamigawa: Neon Dynasty Promos | 159p | Rare | $0.49 | $0.99 |
| Kamigawa: Neon Dynasty Promos | 159s | Rare | — | $0.69 |
One ruling from Wizards of the Coast
- 18 February 2022The target card's mana value must be less than X. A card with mana value equal to X is not a legal target for Scrap Welder's ability.