You can monitor Go Daddy options for dropped domains. But you can also use services such as Dropday or RegistryCompass, which allow you to not just monitor Go Daddy auctions, but also other auction and domain sites such as NameJet, which captures domains that are going to drop soon. I would recommend RegisterCompass after this. I use the service regularly on a daily basis and I picked up some absolute killer domains for very cheap prices.
When it comes to knowing whether a site is Panda or Penguin affected, there are a number of things you can do:
1. You can do a site:query. Just add "site:" at the beginning of the url. When you do this, if the domain doesn't show up in Google results, you can know that it has been de-indexed by Google and Google has fallen out of love with it.
2. Another way to check is to search for the domain name itself, making sure you search for the full thread. Search for that on Google and if the site doesn't appear at the top of the results, i.e., another site appears instead right at the top, number 1, you can know that Google has fallen out of love with it as well.
3. Finally, a third way to check is to go to Ahrefs or another similar service and check to see what the anchor text distribution is. If the domain has a large percentage of similar anchor text of inbound link,s then that's a good warning sign that the domain may have been Penguin affected for over-optimization of anchor text.
Hope that helps! Cheers!
