Bad question for me. I can squeeze Lincoln until he screams and leaves Jefferson on the table. I learned that as a little kid from Mom. She'd drag me to garage sales and I watched her negotiate EVERYTHING. If it was marked a nickle she'd offer a penny.
I'll look at 50-60% If I NEED it. Otherwise it better be below 40.
I buy, sell, swap, and trade. That has been my lifeblood for shooting since I was first married. It started with the usual newlyweds with no cash, so I told my wife any hunting or shooting stuff I sell that came with me will stay as my hobby cash.
I have been living that way ever since, so I am always lookng for a deal that can plump my hobby cash stash. I try to live by this rule, "buy as a steal, sell as a deal." Mkaes me happy and keeps things moving along.