Welcome to the forum, Valdis.

Domains are very hard to appraise, it often comes down to finding the right buyer which is an unpredictable field.

no1poker.com is probably mid to high $xx. Its old traffic means nothing at this point. If you have the old content it might add to the value. Having the actual software will likely be the bulk of the value. The legality of online betting is a major issue for sites like these.

chapterstudy.com probably is worth very little because study is an activity that doesn't have a direct cost. The only use I can think of is discount textbooks and that market isn't going to pay much.

For web-students.com, dashes are poison to domain names and no one is referred to as a "web student." Any value in this would be what you develop, it is otherwise worthless.

If you're looking to sell us dropped domain names you can advertise them on the marketplace once you've been registered for four days.