Before I answer your questions, I suggest you keep exploring this site and perhaps read a complete book on domaining. There is a lot to learn if you want to master domaining, so have patience and keep on learning.
I'm rephrasing your questions a bit, so that other people coming here in future can also be benefited from it.
1. What happens when we list our domain names on a marketplace like Afternic or SEDO?
Marketplaces like SEDO and Afternic have multiple ways to expose our domain names to potential buyers when we list them there.
- They put those names in their database, so that when someone searches for similar names or keywords, our names show up in the result. This gives our names exposure to potential buyers.
- The market places have syndication networks that are connected to various registrars like Dynadot, Namecheap etc. So when a marketplace pushes our domain names to their syndication network, our names show up in the search results of those connected registrars as well.
2. What happens when we list our domain names on multiple marketplaces like Afternic and SEDO at the same time? Is this wrong?
Technically there's nothing wrong in listing our domain names on multiple open marketplaces like Afternic and SEDO at the same time, as these marketplaces have no condition against listing the same names on other marketplaces (there are marketplaces with exclusivity conditions, but Afternic and SEDO are not exclusive marketplaces).
This approach has the potential to expose your domain names to more buyers. However, when you list your domain names on multiple marketplaces at the same time, some people suggest you should put Buy Now (BIN) price on one marketplace only, and set the make offer option on other marketplaces.
Otherwise, in rare cases, buyers may try to buy the same domain name from multiple marketplaces at the same time, and that may cause some inconveniences for you as the seller.
3. What happens when we set the name servers of our domain names to the name servers provided by a marketplace like Afternic or SEDO?
Listing our domain names on a marketplace and setting the name servers of our domain names to the name servers provided by a marketplace is not the same thing.
Listing a domain name to a marketplace only adds the name to the database of the marketplace, but it cannot automatically set the landing page of the domain to a landing page provided by the marketplace. We need to set the name servers for that.
Once we set the name servers properly, only then the marketplace will be able to show their landing page on our domain name.
Which means, when you or someone else on the internet visits the said domain name, they'll see the landing page provided by the corresponding marketplace.
Usually, everyone on the internet sees the same landing page when you set the name servers to those provided by a marketplace. However, this may vary based on how the marketplaces implement the landing page.
Technically, once you set the name servers, you give the marketplace the ability to show whatever they want when someone visits your domain name on a browser. However, as I said before, they usually show almost the same thing to everyone.
Say you have a domain name example.com
, and you've set Afternic name servers on it. To know what people will see when they visit example.com, just visit example.com on a browser a few hours after you've set the name severs.
Hope this was helpful to you.