Easy negotiations

Me Grandpa Joe, he didn't negotiate price. Oh, he'd allow his friend Amos to do so in his stead, so I'm probably playing a bit loose with this assertion. Still, Joe to my knowledge never himself negotiated a price.
I found this out on a trip through western Michigan with him, looking for a pump jack as I recall. I'm still not sure what a pump jack is but I know it had to do with the oil wells he was invested in yesteryear, and I know they were big because we had to take his manual shift stake truck with the ten foot bed to get one.
Anyhow, after driving for two days, two days of me learning to drive a stick I might add (so there were a lot of fits and spurts and stalled engines as I learned through trial by error) we ended up at his friend Ford's. Ford was his actual first name; I don't remember his last. Ford took us out into a field of various machinery, about in the middle of which was an old pump jack. It looked like an oversized grasshopper to me. Joe asked Ford what he wanted, and Ford told him. Joe took a drag on a cigarette, then just said kinda quietly, "I think I'll pass." We began the trip home.
Grandpa explained to me that a fella knows what his stuff is worth, and who was he to argue with that? I get what he means. I rarely negotiate myself, usually giving a simply yea or nay myself when dealing with someone one on one. And it ain't like we can typically negotiate anyway: at Kroger you pay what Kroger asks for groceries or you walk on by. I suppose I was just a bit miffed that, after lurching across the state and staying one long night in a tired old hotel, the journey was for naught. In the end though, I respect his point.