Sure...
usedot . com - brandable, 6 letters, two words, memorable, many generic applications.
madridroom . com - usable, but too specific and awkward. "Madridrooms" would be better, and Spain/Madrid/Hotels.com would be premium in this category.
stuffused . com -again...awkward, "usedstuff" would be more of a premium-ish domain in its category. Though, it could be bought for $60-80 from an enduser.
jobsroute . com -No recognizable or distinguishable meaning.
sqlblog . net - "mysql" would have been better, and also .com/ combine the two together, and that diminishes its natural value. It is a good name for a blog, but the domain name by itself has no automatic marketable value.
These are just my opinions. Only the enduser can determine the value of a domain when they make a purchase. Though, I would be surprised if you beat my assessment of these values. Let us know if you do.