I'm shooting from the hip on this one but Sigma used to make the 70-200 without stabilization for about $800- $900. Then they came out with the stabilized model and I believe it started out about$1700-1800. Then Sigma lowered the price of this OS model to about $1400. I don't think they ever sold the stabilized model for any less. For sure the stabilized model was not under a grand. I have been watching this model for awhile but never been able to pull the trigger on it.