Price look up "Original retail price" not correct.

When my McIntosh MA6500 Interated Amp was bought in Nov 2009 it retailed for $4000. I think it started with a retail price of $3k..then was $3500..and then $4k.

I posted a question here a couple of days ago but still hasnt appeared?
Bill used price reference is $3500..
If the Amp is unused still new in box, any value on top of that ?
Thank you : )
A never used amp 10 years old should be worth much less.
Whether it is or not is another question.