So I have this hook up for bulk pokemon cards. I get quite a fee random ones for a good price. Lately Ive been seeing alot of old school cards in the lot. BJFR sets. I have 2 questions. How do I go about choosing wich ones to keep in my collection and how would I go about selling these oldschool cards. Litteraly getting 10$ worth of value or more for 5 bucks. Aside from reselling How do I go about storing the ones I want vs the ones im selling? I got into the old school cards to re create the early 2000's meta anyway. Any advice on any of these topics are appreciated.

https://youtu.be/m7TiDOt6e2w

The song in link embodies how I feel atm.