Cheapest priced copy (Dominaria United): $0.35 at Card Kingdom, near mint, their price list as of .
Hero's Heirloom 
Artifact — Equipment · Uncommon · Final Fantasy Commander · #346
Equipped creature gets +2/+1.
As long as equipped creature is legendary, it has trample and haste.
Equip {2}
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
2 printings · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Dominaria United | 231 | Uncommon | $0.35 | $0.49 |
| Final Fantasy Commander | 346 | Uncommon | $0.35 | $0.49 |