[Cozumeleno]

The answer's already been said, but I prefer my cards in binders with the exception of a few more expensive cards. I've stored older cards in boxes, then toploaders, and now binders and the binder 'experience' just beats everything else IMO. Cards in a binder with slipcase are protected pretty well.

It's worth noting that I'm dealing with mostly lower grade cards primarily in Poor - G/VG condition. I think the highest-graded card I've ever cracked from a slab was like a 4. Graded cards will certainly fetch more if I ever choose to sell any sets off, but the difference is pretty negligible in my opinion based on the lower grades. Plus, even then I've kept the flips for whoever may want them to prove authenticity should I choose to sell...I've got about 100 or so. The joy of being able to see/feel the cards any time I want far outweighs any small amount of return I might miss out on if I ever decide to sell them.

If I were building a set in mid-grade or high-grade condition, I would undoubtedly keep them slabbed. And as I said, I keep the more expensive cards slabbed. But overall, I don't see much difference between a raw T206 common and one that is like an SGC 20. I'll always look for a graded card when dealing with something a little more expensive but outside of that, I prefer to have them raw.