If you're not sure about Tm infringement, you should read through the legal thread.
If a domain name CONTAINS a trademarked term, and it is used in what the Tm owner considers to be bad faith, it would be very easy for them to sue the owner.
It's called cybersquatting.
For example, any value in the term 3Dblurays would be on the back of the famous Blu-Ray player.
If you used it to sell bananas, it would have no value.