If the part is common, I get them from local TV repair shop supply stores, or computer repair supply stores. There are five of them in my city. If I can't get parts
locally, I order them from catalogs.
*steve*'s right though. Only the old guys in the stores actually have any concept of
what you can do with the parts. They were the ones who did the hobby stuff as kids.
Electronboy said he was in Connecticut.
A local chain we have out west are 'Fry's Electronics', don't know if they're on the east coast.
Parts catalogs I get (for free) that sell to individuals are:
Mouser (in Texas)
MCM Electronics
Jameco
All Electronics Corp (Calif)
But a Google search should turn-up other mail-order places.