old PC computers (Westminster 104th /Wadsworth)

Hello everyone I'm teaching a evening class coming up this spring and I really could use a pile of desktop PCS anything manufactured within the last 10 15 or so years I'm teaching hardware and operating system Basics and I'm going to be running a linux-based system on them anything will do would be great if they had SATA connections on the board but I'm not picky sincerely an overworked and underpaid teacher with a big heart happy 2025 I'm located in the Westminster Arvada area