taylor,
I am going to ask you a few questions about the domains to gauge a better price for you. Please, take your time and answer the questions in an informative manner.
When were the domains registered? Was there a developed website on any of the domains? What kind of traffic and revenue do your domains garner? What are the Google PageRank of the domains?
Without any of the above information, I would say that privatesubmarine.com is in the $20.00 to $60.00 range; I would say that less-expensive.com is in the $120.00 - $160.00 range; I would say that voiporganizer.com is in the $20.00 to $60.00 range. less-expensive.com is probably the most likely to be sold for a higher price, and I am surprised that this domain is not taken! I am sure that you can fetch a more accurate appraisal with answers to the above questions rather than going on name alone. Sometimes, you'll find that going on name alone doesn't tell you as much about the net worth as you think.