Assuming she is in nice condition I would put Lady Slipper at the $10 mark. Most common breezies are $4ish.
All the rest of the girls do look to be on the G3 average scale. Sunnydaze, Fluttershy, Sweetie Belle, Round n Round - $2-3; Bumbleberry, Pineapple Paradise - $3-4; Island Delight - $4-5;