If you're selling AJ's hat that came with her barn playset, that might be worth a bit more. You know how the fans are about AJ having her hat! And the cat that came with the barn is the closest match to Opal.
sailorstitch
I think I do indeed have that hat! But then, the question is, for that very reason... can *I* part with it?
And this is why I have more boxes and drawers of doubles than I will admit to
Its pretty safe to say most of the plastic G4 accessories have a G3/Ponyville source however often in G4 they are changed a little and certainly often in different colours. Set yourself a price from 25c to $1 for each and have offers such as "buy 10 pieces foe $5" kind of thing. That is normally the fastest way to move on common accessories.