Fastbacks Query - value ranges

Hi all, am trying to get to 5 posts to reply a PM...can anyone offer advice on the following please?

Does anyone know kind ball park dollars for good original condition/ or restored fastbacks such as in post "[FS - VIC] 70's fastback"/ thread 74764 (buying, selling & swapping cars)? Just trying to get my head around the value ranges for this model....many thanks.

5000-8000 for a realy need well kept example ....

thanks Notch65s...appreciate ur advice.