Players can now participate in used aircraft auctions, a new addition to the used marketplace.
To put an aircraft up for auction, click the sell aircraft button on the aircraft details page, and under the auction section, choose a length and reserve price. (I know the UI of this page could use some work - it will be re-done at some point along with the aircraft details page)
Aircraft auctions work much like eBay. You set your maximum bid, and the system will automatically increase your bid up to your maximum, in the event that another airline bids on the aircraft. If the reserve is not met, the aircraft is returned to the seller. If the reserve is met, the aircraft will be sold to the highest bidder at the close of the auction.
If two airlines happen to have the same exact maximum bid, and the auction ends, the winner will be the airline who bid first.
As of right now, the auction length does not get extended with each bid, but that is something that we can discuss.
Auctions can be accessed under the Fleet menu.