you can get one for $15 at the local walmart that will work in the 88mhz
range, if you want full fm capabilities you have to add like $10 to that,
they do work, but if you are an audiophile you will not be impressed
because the sound quality is not so great but they are cheap and they run
off AAA batteries for days constantly before going dead, what i would
really like to know is where to get diagrams and parts to build a
powerfull fm transmitter, like a few miles powerfull