Very well said and completely valid and a reason it's best to avoid using places like DAN and others.
Perhaps my biggest complaint is how you list your name on DAN (or elsewhere) and when someone searches for your domain they see lots of similar and usually lower priced options, and/or lower value extensions.
Making it even more disturbing is when the other domains displayed are not exact match names or misspells and your exact match domain ranks down the list instead of at the top where it belongs. DAN.COM in particular is well known for doing that however other marketplaces and registrars also do it, to domain owners detriment.
For me search result relevancy of DAN is better than Sedo and some other marketplaces. DAN does it better than the average. However it doesn't play a vital role. The key is traffic volume and quality. Search function quality is a secondary concern.
Typical end user is not aware of domain marketplaces. They usually buy second hand "Premium" domains from registrars or visit the domain they want. Marketplaces are known by webmasters, developers and domain resellers who are already familiar with those marketplaces and their search function.
Some end users know which domain they want to buy after or before they visit the domain. For me, it's highly possible that those end users are not even aware of domain registrars. Here I am talking about billions of typical internet surfers who use internet mostly for social media, emails, internet banking, etc. Those billions literally have no clue on how websites and internet works. The World is not consist of domainers. Most people do their own job and have no clue on other jobs. All of us are end users of almost everything we use daily and we have no clue on how those things work.
If the domain is landed on a marketplace, potential buyer learns there is a thing named "domain marketplace" where tons of alternative domains are waiting to be sold. This is the main problem with landing pages of marketplaces. They design landing pages to work for them, not for domain sellers or other people. They have to show all domains in order to sell a domain and earn commission from your visitor. They don't have to sell your domain as long as your visitor buys a domain. So their landing pages are designed to tell your visitor this message: "Hello visitor, if you don't like this domain of Bob, don't worry. We have a similar domain of Tom and thousands of similar domains of thousands of other sellers. You don't have to buy this domain of Bob. We don't care about Bob and his domains as long as you buy a domain from our marketplace
" This is the most critical issue. Marketplace and domain seller have a different way how they make profit. Those two can not cooperate without conflict of interests. They have different interests. Seller wants to sell a particular domain, marketplace wants commission from any domain, any buyer and any seller.
I dont have my own marketplace website to tell, but I read several times in other threads that domainers rarely sell domains at their own marketplace. However this can be because the domains were using external landers such as Dan or Uniregistery.
There are benefit of using well known marketplaces for your landing pages: trust factor, multiple payments options and chat support.
SEO has no benefits at all to domains selling, no one will search in google "CoolDomain .com for sale".
I don't have my own marketplace either. I talk about a very basic landing page with 1-2 sentences that say the domain is for sale, how to contact seller, price and other info that deemed very important.
yes SEO is not a critical factor. When I say SEO I mean overall accessibility and uptime as those affect SEO. Sorry for confusion. Landing pages of marketplaces have variety of techical issues including but not limited to SSL, DNS, browser compatibility, reflecting updates in price, email delivery, software/design updates, etc. As a webmaster with server management skills I know it's not easy to host millions of domains even if you automate everything. Those issues lower the number of visitors who actually display and read your message of "This domain is for sale". The worst part with this is you can not measure and know. Stats and server logs may show your domain received 100 page views yesterday but you can never know yesterday 500 visitors could not even browse your domain.
Trust factor varies depending on price. Landing at a marketplace works better for low priced domains. Those domains usually don't receive good traffic. But if a domain receives good traffic, hosting your own landing page works better regardless of price and trust factor. Because losing a sale for trust factor is less likely than losing a sale for alternative domains of other sellers in marketplaces. Once your buyer wants to pay the price you want payment/transfer can be handled by a mutally trusted third party, or sometimes buyer might pay directly with no trust issue especially if the price is low.
So I don't recommend anyone having own landing pages blindly. I don't use my own landing pages for my own domains. Because most of my domains are low priced even the ones with traffic, I don't have time for negotations and so on. I only share pros and cons, try to share what I know. I am techincally capable but I don't offer landing page hosting/creation service as it's not worth my time.
Most domains don't receive any offer. Domain quality and wrong pricing are the major factors. Another factor is marketplaces in many different ways that I didn't mention above. For instance, some marketplaces like Sedo display seller country and encourage/discourage buyers based on seller country. Technically displaying seller country is not necessary or at least it should be optional. I remember here someone had a thread to complain about not making sales as he is from Russia. Marketplaces can kill potential sales in many ways. As you have no control over them there is no solution for those problems.