Make it a point to do outbound marketing to 5 potential buyers a day. To find and contact by email (or their contact form) 5 buyers every day takes me about 10 minutes.
I only market EMD's to potential buyers that are spending money on ads (Google PPC, Yelp etc). Try to make sure not to click on their ads and just go to their URL directly or you will end up costing them money.
Make sure the domain name goes to a page with a buy now (and make offer option). Tell them you are emailing others as well and they can buy it or make an offer by visiting the page. This is a very powerful way to get them to decide fast because they see that anyone coming to the page could just buy it.
Include the monthly search volume for the keyword (broad volume and exact) and include the average CPC. If you are using Dan you could offer installments as well etc. Always include your phone number in the email. (get a number that directs to your number, not your actual number). If it's your name tell them its your name and you are not a broker.
Selling names using outbound marketing is not easy (especially names that are over 1k), but sales do happen.
One of the biggest mistakes made by many sales platforms is not showing what others names have sold for, even if they are not related to your name. The average person does not know that every week there are domains that sell for over 50k and they don't know that many domains in history sold for over 500k.
I cannot even stress the importance of this information, this information closes sales, just like in real estate the agent knows that showing comps in the area that sold for more can only help.
I include some data in my emails about this, but if these platforms really want to help, let users opt to include some recent domain sales statistics or some other way that we could add some data.
Good luck