Hi! New to sub w/ a question. What’s the best way to sell common, uncommon, and rares?

I’ve had luck on eBay selling my EX, full arts, and secret rares. Now I am looking for a genius way of selling the rest. About 3/4 of the cards are from XY and the rest are from Black and White. I’ve seen stores in town do mystery bulk packages for $5-10. I could do something like that, but the shipping would take away a lot of the profits.

Any help would be appreciated.

*If you know any C/UC/R cards that are worth selling individually please let me know.