I personally find wired lavs to have a muffled quality and limiting in terms of shot type, camera placement. They have their use but only after more traditional shotgun mics- either boomed manually or from a stand are ruled out. I'd search in that direction. You'll likely find something AKG or Sennheiser somewhere near your price range. You'll ultimately get much more natural sound that way.
Ideally for indoor work you want to use a good cardioid or hyper-cardioid pencil mic on a boom just out of the shot. Most shotgun mics under $1,000 do not work well indoors because they have poor off-axis sound rejection, thus they pick up almost as much sound from behind the mic as they do in front of the mic. Cardioid / Hyper-cardioid mics have very good off-axis sound rejection, making them the best choice for average to small rooms.