I have added all of my domains to bodis, they have an option to point your domains directly to an inquiry form instead of parking. It is free to use and here is how you set it up:
Manage domains
Select all names you want to display inquiry form
Change sale status
Inquiry form
Check (Auto-redirect to inquiry form)
Done
*Alternatively you can add all of your domains to the flippa domain catalogue and forward them all there or change name servers and it will point to a landing page. This method is not free, upfront it is but for each sale you will pay 10% commission on sale.