How much is my custom organ speaker worth?

Hi all,

I have a large custom organ speaker and it needs to go, but I have no idea how much it's worth. I'm not very technical about this kind of thing, but here's what I know -

It was built by Stevens Custom Organ Co.
It measures 48 x 41 x 20" and weighs about 300lbs
It has 2 15" and 11 8" speakers + amp

The front and back pictures - the battle axes are purely decorative :)
custom organ speaker

I realize that's not much to go on, but any and all information would be greatly appreciated.
Thanks!