Those are all so pretty I'd be hard-pressed to pick a favorite. I do love that daisy fabric a lot though. :) You did a great job on all of them!
I'd love to say "no" about quilting in the middle, but imvho, I'd say that's a large enough area to get "shifty" when washed, if there aren't any stitches to keep the layers together. Some battings say you can go up to 10" without stitching, but I personally don't trust that. Maybe these won't get washed much, but then again, maybe they will, and I would hate to think that lovely straight and excellent piecing could get all puffy or stretched out of shape in the wash. Just mho though. :)
These should sell with no trouble at all!! They'll go like hot cakes. :D I have no idea how you should price them though. I"m sure others here have more experience with that and could help you out.