Yea well, believe me, almost every big seller on ebay (I have 919 feedback, I'm talking about the people 10,000 plus) are in it for the money. There's a lot to be made, its like a tiny stock market and there are a ton of people who don't collect at all and only buy to resell or flip boxes/cases. I collect a bit, buy boxes for fun and flip singles for fun and bc it helps me pay for all the personal collection with a small profit left over.
I make a good amount of f/s and f/t threads, check em out! I'll always listen to reasonable OBO. I'm all about mid/high end basketball and baseball prospects. I love this hobby!