What should I do with these domains?

[admin]

I have several domain names that I have been thinking about selling, I have not done anything with them they are just sitting in my account. I bought them intending to create a site for them but I have already lost alot of money trying to create some niche sites and want to get some back. Please let me know about what they should be worth, and if they should be sold or should I just hang on to them and work them a little to get higher value. Thanks
Domains Names are\
<!-- w --><a class="postlink" href="http://www.pettubelive.com">www.pettubelive.com</a><!-- w -->

<!-- w --><a class="postlink" href="http://www.nichebids.com">www.nichebids.com</a><!-- w -->

<!-- w --><a class="postlink" href="http://www.budgetbirthdays.com">www.budgetbirthdays.com</a><!-- w -->

<!-- w --><a class="postlink" href="http://www.stillgotgifts.com">www.stillgotgifts.com</a><!-- w -->