Cheapest priced copy (Weatherlight): $0.39 at Card Kingdom, near mint, their price list as of .
Goblin Vandal 
Creature — Goblin Rogue · 1/1 · Common · World Championship Decks 1998 · #br105
Whenever this creature attacks and isn't blocked, you may pay {R}. If you do, destroy target artifact defending player controls and this creature assigns no combat damage this turn.
Legal inCommanderLegacyVintagePauper
Not legal inBrawlStandardPioneerModern
3 printings · $0.39 to $1.29 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Anthologies | 41 | Common | $0.79 | — |
| World Championship Decks 1998 | br105 | Common | $1.29 | — |
| Weatherlight | 105 | Common | $0.39 | — |
2 rulings from Wizards of the Coast
- 1 April 2008If the defending player controls no artifacts that you can target, the ability doesn’t go on the stack and you can’t pay {R}.
- 15 April 2013An ability that triggers when something “attacks and isn’t blocked” triggers in the declare blockers step after blockers are declared if (1) that creature is attacking and (2) no creatures are declared to block it. It will trigger even if that creature was put onto the battlefield attacking rather than having been declared as an attacker in the declare attackers step.