How much do you think this antique piano is worth?

It is an 1884-86 John Broadwood and Sons upright piano, made in London. The Serial Number is 59191

It has been looked at, and established that it could be tuned to original sound, but a tuning has not been done. The only oddity is that this piano has a birdcage action.

The cabinet is in pristine shape, with the original gold inlay on the front still visible. The brass hinges and decorative casters are all original as well. The legs are hand carved and solid wood. Key tops are all original ivories, with not a single chip visible. The only downside is the lower soundboard is missing.

Here are links to pictures:

http://images.craigslist.org/3n63kf3o25Y45T65S1a5g...

http://images.craigslist.org/3n03k23o65V15X25S4a5g...

http://images.craigslist.org/3ne3k13l95W15P35R2a5g...

How much do you think this pianos value would be?