I just took a random guess of 100 to 200, but as soon as I voted I knew that was way too low. Let me tell you a story.
I was living in Iowa when I got my current job. I called a moving company to get estimates on the move, and the guy came to my apartment.
"Single guy, no appliances, I'll put the weight at 2000 pounds," he said.
"I have a lot of books in boxes," I said.
"Oh, I'm good at this. Your move will be 2000 pounds. Trust me."
"No, you don't understand. I've got A LOT of books. That little bedroom full of boxes? Those are all books."
"Okay, 2300 pounds then. Do you want me to bind that estimate?"
"Yes, please." Estimate bound; no matter how much it weighs, I will only be charged for 2300 pounds.
Moving day comes. Estimator guy isn't there, but the movers are impressed.
"I'll bet you got 3000 pounds here. You got a great deal on the estimate."
"Well, I got a lot of books."
Fast forward three days and 800 miles to Mississippi.
"So," I ask, "what was the final weight on that move?"
"It was 5000 pounds." Dirty look from mover guy. "You got A LOT of books and you're lucky you got that estimate bounded."
"Yep, I do and I am."