HI! In need of coins to help me with my studies!!

I am studying to become a Numismatist and would be ever so grateful for any small donations of any coins that could help me with learning to understand and distinguish the between the different types of metals that coins can be made from as well as the different markings on them which correlate to the time period in which they were made. Thank you so much in advance for any donations you might be able to help me with. I can pay for them and pick them up from any location. Thank you!!