The plugin is good, but I have some ideas:
1. Make auto auctions. In more detail: at a certain time, there was an auto auction with 1 or more items.
2. Make an auction creation command: /auction create <price> <minimum bid> <auction time>
3. Make a menu with auctions and allow creating multiple auctions.
4. End the auction immediately, and the item will be given to the person with the highest bid. If there is no bid, the item will be given to the owner