Upon successfully escorting Rabiaire (and his explosive device) to WoW Classic 20th Anniversary Gold Petardol in Ratchet,you'll be greeted with a solid set of rewards that reflect the celebratory tone of the 20th anniversary event.
Rewards (Original WoW Classic):

1,700 experience

150 Ratchet reputation

Choice of two items:

Blazing Staff: A fiery-themed caster weapon,ideal for low-level mages or warlocks.

Greasy Tinkerer Pants: Light armor with bonuses to Engineering and Agility,perfect for rogues or tinkerer builds.

Rewards (Season of Mastery variant):

2,370 experience (with an increased XP reward)

But the rewards don't stop at experience and items. As part of the WoW Classic 20th Anniversary Gold Event,completing this quest earns you WoW Classic 20th Anniversary Gold—a special currency used for exclusive event-themed rewards. This anniversary gold can be redeemed for a variety of celebratory items,such as:

Exclusive Transmogs: Classic-style gear with a vintage flair.

Anniversary Mounts: Limited-edition mounts that give a nod to WoW's legacy.

Raid Banners & Collectibles: Items that celebrate the history of Azeroth and bring a touch of nostalgia to your collection.

The inclusion of these bonus rewards adds another layer of value to the quest,giving players the opportunity to collect rare anniversary-themed loot while they embark on their chaotic adventure in WoW Classic Fresh Gold for sale The Barrens.