do y'll have used cheap graphics card or just parts bins in general? more specifically looking for something i can mine with

They got for every budget

They have graphics cards in all price ranges. In fact, it's that way with all parts and equipment. There are refurbished parts and systems as well.

Microcenter sells some refurbished equipment, as well as open box items. Sometimes you will find bins of clearance items and I have definitely seen computer parts in those bins.