How much this piano can value?

[steindd]

Guys, there's an old piano that just sticks around my grandma's house but it's not being used anymore. Some other day, a fellow that works with antiquities offered $6,000 for the piano.

I never thought it could cost something like this. So, for this, I decided to search and know really what value this piano really have.

The name on it is: Gors & Kallmann - Kaiserl. u. Konigl Hiflieferanten, Berlin. It has been bought around 1914.

Here goes some pictures of it:

https://imageshack.com/a/img802/7170/5zip.jpg

https://imageshack.com/a/img607/8205/uu4s.jpg

https://imageshack.com/a/img811/7899/gubs.jpg

https://imageshack.com/a/img855/936/alnn.jpg

What do you guys think?

[iansinclair]

Got to admit that around where I live I'd take the money, making sure that it was real cash, and run.  Or, to put it another way, I doubt that I could get that sort of money for any upright.  But I could be wrong; I'm not that knowledgeable about many piano brands.

[awesom_o]

Some other day, a fellow that works with antiquities offered $6,000 for the piano.

How come the piano is still sticking around your grandma's house?

[andrewuk]

From the pictures, the outside is not in a good state, and if the inside is similarly neglected then it's not going to be any good as an instrument. I can only guess that some bank robbers once used it to stash the loot, and buying the piano is the only way to get it back...

[hfmadopter]

I can tell you this without a quote from a rebuilder, it will cost you thousands of dollars to get that piano up to nice condition.

[lacy]

I am no expert but Gors & Kallmann are very well regarded pianos, particularly that period but that looks too far gone to be worth anything like $6000.