Project will be posted by Subject experts and and freelancers can participate on this deal and place their bids and all bids are active untill the auction ends.The seller can award the project to buyer at any time of auction.
Other freelancers cant see previous bid amount and freelancers who are approved by admin can only be participate on bidding.

Here are the steps for bidding.
1) Click “Find Projects” tab after logged-in as freelancer
2) submit the proposal amount and estimated delivery date