An $80 Trek 750, in almost any condition, is almost certainly sold by now. In fact, it was probably sold by the time you saw the listing. The 750 is near the top of the line of the '90s Trek MultiTracks and they're pretty sought-after bikes for those looking for a traditional, high quality, steel framed bike. Trek made millions of MultiTracks, so they're somewhat common, but nice examples of the higher end models don't appear too often.