I don't want to make anyone mad.
Then you're in the wrong place here, brother! (just kidding... no I'm not:)
I've seen many feathers ruffled here on PW over the years (including mine-:); and, sometimes over little or nothing.
And, sometimes you can make some folks mad at you just by showing up (ask me how I know this)...
On a lighter note, when it comes to buying, selling and negotiations, as someone else mentioned (j&j?) it can be an interesting and enjoyable experience; sort of a game/sport/challenge, if you will. Sometimes it's a game of matching wits, or a game of chance or exercising our communication skills and ability to persuade, or not.
And, sometimes you have to strike while the iron is hot, so to speak. Years ago, I was in the mood for another old upright piano project. Saw a prospect fairly close to home on CL and called to make an appointment to see it. It was an old upright piano (Gulbranson?) in an old farmhouse, and the piano belonged to the daughter of the farmers, although she no longer lived at home with her parents.
To make a long story short, (which I'm not good at:-) I kind of liked the old piano, and made them an offer less than they were asking. The young woman, who was there at the time, said she didn't want to sell it for that price. I politely said OK, and thanks for showing me the piano. And, I left the piano in better condition than it was when I arrived because I took my tuning hammer to test the torque of a few tuning pins, and gave it quick tuning tweak to test the tightness of the tuning pins.
The owner seemed thrilled that the piano sounded better than it did when I arrived. Maybe that is why she didn't accept my offer.
Anyway, a couple of weeks later she called me and said she had decided to accept my offer on the piano. However, I had already bought another one after I looked at her's.
Moral of the story? Strike while the iron is hot, and make an offer before tuning... or not.