it probably has something to do with the brand.
all the kiddies seem to prefer the french and some japanese brands like fuji and nishiki etc where im from.
if you want a quick sell, put it up for $200 and im sure itll go quick. if you dont mind the waite stay where your at.
i dont know much about centurion other than it was an american importer of japanese made frames, but the parts on it suggests you are at a fair asking price