The driving to deliver something hits home.
Them- "You are 2 hours away, will you drive to me for the $40 item?"
Me- "No, not worth my time"
Them-"OK, how about I give you $20 extra for gas"
The other thing is the "I have to ask my significant other"
Situation recently, had a set of rough but round and OK C5 vette wheels for $100. Had a guy come over and test fit them on his S10. Spent an hour at my place with my help to bolt them all on and make sure they fit. He took a picture sent to his wife to ask if he could buy them, took them off and left. Thankfully sold them a week later for $120 to another guy in a rusty S10, lol.
The "trade game" is another one buyers try
"Will trade 5 empty propane tanks for your jeep"-No.
"will trade a crossbow"-No
"Will you take payments"-Yes, 1 payment of the asking price