If you figure what people ask for them you are better off buying a couple flats and using the hulls. If you figure 15 cents each then shipping you have over half the cost of the shells making new shells affordable.
I bought 5 flats from Gamaliel's for $445.00 and $25.72 shipping. Recovered $100 from Winchester. I figure it costs me $4.00 a box to reload them so that is $200. My net cost for the empties is $170.72 or 13.7 cents per hull.
Doug, you may still be able to do the same deal by the end of the year.