It is what it is......I guess

I enjoy going to swap meets and selling stuff, usually meet some interesting people and talk about cars, always a good time. And I like to help people out by sometimes giving them or selling them something really cheap.

However, it seems like there is usually at least one jerk who will look at something, ask what you can do on it, I give him a number, he then says maybe, going to look around. Then comes back, asks if you can do any better, I say no, and he walks away again. Comes back a third time, starts nitpicking on the part and throws out a ridiculous number, expecting that you will take it because of all the alleged faults he pointed out. At which point I will tell him I'm not desperate to sell this part, and I will take it home and try again some other time, instead of taking his shitty offer. I actually had this happen with a new in the box ring & pinion I had.

The guy seemed genuinely taken aback that I didn't go along with his line of BS. Where do clowns like this learn his negotiation skills, from watching Richard Rawlings?