I'm not going to lie, I've only used this once and never used it again. I can sort of explain it to you to the best of my knowledge but I may be incorrect on something. If someone could write to me if I'm incorrect about something, please do. Like before, here's how to auction something off:

• Click on the item in your inventory and then click the AUCTION button. Double-clicking the item will only lead you to the SELL window.
• A window will appear much like the SELL window only with different options:
Time (Hours): This will be the amount of hours your item will be auctioned for.
Starting Bid: This will be the lowest amount that your item could be auctioned for. So, if we put in 1,000 the lowest amount it could sell for is 1,000 NX.
Bid Increasement: This dropdown has four options you can select; 10, 100, 500, 1000. Depending on what you pick, the next person to bid will bid this amount. So, a person buying our item for 1,000 would have to bid at least either 10, 100, 500, 1000 to make the current price 1,010, 1,100, 1,500 or 2,000.
Direct Purchase: This is a cap amount that your item will be sold for. If set, anyone could go in and directly bid this amount and win the item instantly. I personally wouldn't set this, as you're basically capping your income. Why would you want to say "No thanks, I'll take 5,000 NX instead of a chance at winning more"?
Units: Like selling an item, this designates the quantity of the item you're selling.
Listing Fee: Again, a flat fee of 5,000 Mesos to you to put up the auction.
Starting Price: This will show you the minimum price for your item. The NX fee is added in just like a sale.
Buy Now: This will show you the direct purchase for your item. The NX fee is added in just like a sale.
• Again, you get another OK/CANCEL button for final confirmation.

Hardly anyone uses auction, but if you prefer to use it go on ahead, no one is stopping you