If you were in Ontario, I would offer to purchase. I generally pay $1 per G3, and $1 per G4. That is sight-unseen. I would consider paying a bit more for G4's if there was a good percentage that were non-mane-six. If the G3's are perfectly clean and fresh from the box, then I would pay $2 each for them. I might be interested in buying the lot anyway, depending on how much the shipping would be.
The giant plush frilly frocks I'd suggest you sell locally - I sold mine for $250. She was mint in her original bag and box.