where should i get ipod classic 7th gen for cheap?

I know yall will say ebay or fb marketplace but even those options are expensive, im currently in the process of moving so i can't spend a lot of money but i would very much like to listen to music during school, not having to deal with ads, etc i would also like to know any earbuds that would actually fit in my ears cuz every time i try to put them in they don't want to stay.