How to add a bid manually
Click on the name of your Campaign in the left-hand menu bar.
Click on the Auction tab.
Click on Items.
Click on the items you want to enter a bid for manually.
Fill in the Bid Amount.
Select the Bidder Name or ID.
Click Manually Add Bid.

✅ Note: It's possible the previous highest bidder had a max bid set that is higher than the manual bid you're about to enter. Give the screen a few seconds to update so you can be sure who the current highest bidder is.