I see you are in New Jersey.
April 11 & 12 Howard Zane is holding a BRASS EXPO
at the Timonium MD Cow Palace. I believe Norm Pullen will be there also.
All scales and anything pertaining to brass model trains. Howard is also having a consignment area. Consider displaying your brass stash there.
The following Saturday there is the Strasburg Pa. 0 Scale Train Show. 9 to 1. This is a hard core 99% two rail show with about 80+/- tables
IMO, Get either place early while the wallets are full.
Otherwise,O Scale Yard Sale Yahoo Group has done extremely well for me.
Maurer Auction on PA rt23 is also near by. Premium stuff being sold there frequently.