Simon, it's possible I'm imagining all of this but I'm not. Many times if some one advertises something with any sort of coastal price tag it's pounced upon with negativity by the Midwesterners. Very few bikes now show up.. graham attributes this to Facebook as the better medium for local sales.
All I am proposing is some kind of registry with details. I have no problem with posting separate items such as parts as it now works but honestly if you look at the offerings they have become Les and less.
Have you looked at all the competing Facebook groups out there? They are moving in on your turf. Maybe that's ok.