Thanks but absolutely not, no thank you.
I do not know when it was last tuned, but I know enough to appreciate that bringing an 83 year old piano up to pitch while minimising risk, not breaking strings, tweaking mechanisms etc will require at least two visits by a skilled, very experienced person. And I am both happy to fund the work, and to appreciate the skill of the person who I have lined up to tune it, because they have spent decades acquiring those skills.