Lots NY stores take lenses in trade. You won't get as much as selling on your own but easier Also Calumet recently opened a store in florida - not sure where. Finally there is KEH, again you get whole for your gear, but save the hassle.
A place to consider advertising is with Artie Morris (Birds as Art) - he lists equipment and takes a cut. not sure what the cut is and if you need have been on a workshop with him.