You seldom find a reasonable price bust cap half dime ,as you stated to high, to low....and middle grade slabs few and far between over priced. You best bet.....raw if you can find them....next to bust quarters these are getting harder to find within a reasonable price. When I do I jump on it....but like you more duplicates than I prefer....however that's how I've scored a few R 4 and 5 coins by taking that chance.
Oops, I forgot a couple steps. 1. Put my raw coins in new 2x2's. That takes a while since I have to label each one. 2. Photograph all of them. The slabbed ones as is; the raw one before I put them in a new 2x2. Editing the images is a REAL pain.