which DSLR should i get?

basically i’m a film student and i’ve wanted my own camera for a while and because this semester i have multiple filming projects to do at once i thought i’d buy my own instead of constantly having to borrow from the school. i’m not ready to spend super big money on one camera so i want it to be second hand i’ve been looking on facebook marketplace but i’m not sure which one exactly would be the most worth it. i’m willing to spend 250-300 CAD max on it and i dont mind if its a kind of older model as long as it’s from the last 15 years and i know it would last for at least couple good years