Festool turbo 4001 dust extractor

[Johndugless]

I have currently got a festool 4001 dust extractor, what I have owned since it was released, I’m thinking of putting it up for sale and changing now to something what has a bigger bin so the changes aren’t as frequent. I know the dust extractor is discontinued now and there are not listed for sale on the net.
So my question is what is worth?

Any help would be really appreciated.

Regards

John