<p>You should have no problems with a used PRS transmitter. I think just about every student agrees they're a waste of money, so I wish we could just eliminate their use. Oh well.</p>
<p>I got a used one and it worked perfectly for the entire semester.</p>
<p>If you're anxious about the transmitter breaking, just use it exclusively for the midterm bonuses. (You get a 0.1% bonus to your grade after each midterm for voting with your transmitter during lecture.) There used to be attendance bonuses for voting in every lecture, but they weren't given anymore as of fall 2005.</p>