I think it is the best place for this post, if it is not, I apologize and the administrators please move it where appropriate. I recently found this short but precise tutorial that has brought me good benefits. I want to share it with you now and know your experiences. In order to obtain quality loaned niches, we are going to use two online tools, Ubersuggest and ExpiredDomains. 1.- With ExpiredDomains you will search for domains that are recently expired preferably. 2.- Then you can place the domain in Ubersuggest and see how many keys it has indexed. 3.- If the domain has a good amount of key still alive, you could search the Google cache for the post and recover them, and you'll have a niche with potential. I hope it serves you.
That isn't an abandoned niche, though is it? If anything it points to a niche so overcrowded the domain owner has let the domain drop rather than renew.
I agree with @sarahk Those are not abandoned niche. Those are abandoned domains which webmasters did not found profitable at all... Abandoned niche would be "selling oil lamps", when others are "selling electric bulbs".
Agreed. Any abandoned site is usually due to no profits. I'm not even sure that an abandoned niche would be too good, as @JEET said, why sell oil lamps? You want an unsaturated and easy niche.