Consignment...Seller won't budge off of asking price.

It doesn't seem unfair, but that doesn't mean you should buy it. How much do you want it? How much does she want to sell? Is there other interest in the unit? You could walk and see if she calls you back, or just keep looking for that matter.
Frankly, the asking price that others want mean not very much to me. They may all be out of line.