Rather than eBay junk collections, I might suggest spending the same money on a single coin, and eBay might not be the best place to buy. Our members here sell and trade coins, and it looks like you have enough posts to do so (but I don't know the exact number needed). If you need help finding sources for coins, ask CCF members by posting in our "wanted" section.
I am not sure if you are interested in everything/anything or want to focus on just a couple series, but we can help lead you to sources. Many of us at least start out with searching through rolls of cents that you can get for face value from your local bank. It's a great learning experience and anything interesting you decide to keep only costs you face value. I have found valuable errors and even Indian Head cents
this way. Searching through rolls may not be for everyone, but it is an inexpensive way to get started. Good luck
ša va bien aller