There are no specific commands for auctioning. Auction is a chat channel so you would do /ch auc to access it. If you want to bid on something simply say "$whatever @item being auctioned" (for instance if I were auctioning a dirt block for $1000 you might say, "1k @dirt"). Once an auction is won, you would likely pm the auctioneer and meet with them to exchange money for the item. Be careful and take plenty of screenshots during a transaction to avoid being scammed.

EDIT: Almost forgot, if you want to initiate an auction, say something along the lines of "Auctioning 1 dirt block starting at 1k. GO" When users make bids you would say, "heard" or "hrd" following the amount they bid (if a user bids 1k at the dirt say, "1k hrd"). Once a bid is heard, you CANNOT cancel the auction as it is against server rules

 

moved to help & support -->