What Does "Reasonable Offer" mean?

This story is on another thread and and I have no idea how to move it here.
I had shop for Wood Boats for almost 10 years. Closed when rent became unreasonable.
I'd been buying parts for years before that & at one time had almost 2000 parts(majority was chrome) & 25 engines and restorable boats came & went
One largest show in Florida, in March & decided to bring to sell. 1st year people happy to get what they needed & paid! Made $1800 in two days first year. By the second year was getting grumpies saying I was asking too much.
One year guy was a jerk about my prices(offered $10) & I took a ballpeen laying there & beat on the part & then told him he could have it for that now.
Not long after we started leaving parts home in Indy & just came down & enjoyed the show & vacation.
Sold( traded) all parts to eastern boat shop after heart attack & still haven't recieved the boat restored, that I was promised.
Oh Well!