Low XXX to X,XXX if you found a valuable end user who would like to purchase the domain.
.io Has been a staple for auction platforms such as Flippa as of recent -- with many sales being as low as 100$ direct from a 3 character LLL .io domain. With some reaching as high as XX,XXX (however those sales are few and far between) realistically you look at making a small XXX turn around with the potential for more if you market it wisely.
DNL could be
Domain Network Liaison,
Do Not Label
Do Not Like
And can be used in any other settings -- however with all domain sales, we must stay realistic, and look towards past sales to wisely market our future acquisitions.