The first rule of building a binder set is that you're gonna need a binder.
1 BCW 3" Black Baseball Card Storage D-Ring Album Binder & 50 Pages 9 Pocket - $23.28 delivered
25 Ultra PRO Platinum 9-Pocket Hologram Card Album Pages/Binder Sheets - $7.92 delivered
Total spent on binder set: $31.20