From the DelveRush Wiki · Economy and land
Biofuel Exchange
The Biofuel Exchange is the player market for sealed fuel canisters.
Create a listing
Stand near a Filling Station. Hold one sealed canister and run /fuel sell <price>.
The exchange moves the item into escrow before it publishes the listing.
Buy fuel
The purchase moves Coins and the canister in one database transaction.
Cancel a listing
Run /fuel cancel <listing-id>. The exchange returns an unsold item.
Market scope
The listing market supports sealed fuel only. Tools, weapons, gadgets, and armor use direct physical transfer.