I think what your doing by donating the proceeds to your shelter is great.
I don't know why your stuff isn't selling, it all looks nice. The only thing I can think of is maybe the price. I don't know if you could afford to lower the price's a little but if you could maybe then they would sell faster.
I do think it has to do with your sale being around Easter and everyone having other expenses in relation to that holiday to pay for.
Good Luck.