I'm glad you liked the information. I will provide a little more information and numbers and I will explain with an example to make it easier to understand.
Let's say example.com has expired and it was registered with Godaddy. What would happen to that domain?
Day 0: example.com has expired. It was registered with godaddy. About 35% of all .com domains are registered with Godaddy. The day the example.com expired it was auto renewed by the registry Verisign for free for 45 days. The same is done for all .com domains.
Day 24: example.com is put up for auction at godaddy.com with a starting price of $12 plus reg fee. This makes $20 with coupon codes. The auction will last 12 days. Godaddy calls these auctions "expiring", while I call them "pre-release" to keep consistency. The auctions are run here:
https://auctions.godaddy.com
You need to select the "expiring" category. These are freshly expired domains that have expired 24 days ago. They are still under control of Godaddy because of the auto renewal which was originally planned to give the previous owner a chance to renew his domain after expiry.
Day 36: example.com auction closed without any bids. Godaddy has now pushed the domain to "buy now" section which they call "Closeouts". The domain will stay here 6 days. Each day the price will drop by one USD. Today the domain is available to purchase for $10 plus reg fee which brings the total to $18 with coupon codes.
The link for Godaddy Closeouts is the same
https://auctions.godaddy.com. However you need to click select "Closeouts" on the menu.
Day 37: The buy now price is now $9 plus reg fee
Day 38: The buy now price is now $8 plus reg fee
Day 39: The buy now price is now $7 plus reg fee
Day 40: The buy now price is now $6 plus reg fee
Day 41: The buy now price is now $5 plus reg fee. Total price is now $13 with coupon codes. Nobody bought the domain.
Day 45: The auto renewal by the registry has expired and there was no payment. Now the renewal is cancelled and the domain will continue dropping.
Day 85: Example.com enters pending delete. It shows in the snapnames and namejet pending delete search results with a date next to it. The date is 5 days later from today which is the dropping date, the auction start date and the last date to backorder. Backordering at snapnames costs $59 and at namejet $69.
Day 90: Example.com has now dropped and is now available to register.
Godaddy's website does not give any numbers on how many domains they have in the expiring section or in the closeouts section. They also limit search results to 40.000 domains. Therefore you can not calculate the total number of domains from number of pages. However domains from both categories are listed on NameCatch and there is also a stats page where you can see how many domains are coming from what category. You can also see the numbers by extensions.
For instance, right now there are 169.556 .com domains in Godaddy pre release and 26.744 .com domains in Godaddy Closeouts. These lists are updated daily. I don't get any commission from Godaddy for referring customers to them.
Happy domaining
Erdinc