Did I do the right thing?
"If you think that is a fair price"??? You're killing me here. No wonder this is wearing on your mind.
I would forget about it if I were you. When I retire, I will be so ecstatic about lounging around in my garage tinkering with stuff and not having to think about work, YECCH!!!, I will be happy to help someone else out.
I don't think that I have ever had to spell "yecch" before. I had to look it up in the dictionary. Remember those things?