Looking for mower recommendations for large area.

I'm moving to a house that has about 6 acres of land. A good section of it is grass. In negotiating I was trying to get them to leave the diesel john deer zero turn but the people selling the house were borrowing the mower. With that said, I need something that has a pretty wide mow deck. I don't mind buying used but I want to keep it under 10k. What brands/model should I look for on marketplace?