Shipping large items

I’m thinking about putting a large item up for sale on eBay, and I’m concerned about the logistics of shipping it. It’s roughly 7’ x 3’ x 3’, 200ish pounds, and I’ve long since disposed of its original packaging. How would one go about finding appropriate packing materials for such an item?

Do what I did when I had to sell half my funiture because I was moving to NYC from a 3600 sq ft house.

Say that you won’t ship it, they’ll have to come get it. I had a couple drive four hours for my patio set.