Well take a look at some of the best cards and strategies below
Conclusion Black gives a very different feel of their less than $1 rares and in a great way
Includes members and/or support for the "Abyss Actor", "Abyss Script", "Abyss-", "Archfiend", "Artifact", "Bujin", "Change", "D/D", "D/D/D", "Destiny HERO", "Dragunity", "Elemental HERO", "Galaxy", "Galaxy-Eyes", "Gladiator Beast", "HERO", "Ice Barrier", "Infernoid", "Lightsworn", "lswarm"

Sort Card Type Glalie #18Rare $1.03 Glalie #34Uncommon $1.02 Glalie #13Rare $1.23 Glalie #30Uncommon $1.28 Glalie #25Rare $1.02 Glalie #32Uncommon $0.21 Glalie #48Rare $0.28 Glalie #42Uncommon $0.11 Glalie #52Uncommon $0.14 Glalie #32Uncommon $0.08 Glalie #20Uncommon $0.42 Glalie #18Uncommon $1.45 Glalie #16Uncommon Glalie (Team Plasma) #22Uncommon $0.40 Glalie EX #34Ultra Rare $1.97 Glalie EX - 014/059 #14Double Rare $2.06 Glalie EX - 060/059 #60Super Rare Glalie EX (Full Art) #155Ultra Rare $14.55 Glalie Spirit Link #55Uncommon Glalie Spirit Link #139Uncommon $0.29 M Glalie EX #35Ultra Rare $8.48 M Glalie EX (Full Art) #156Ultra Rare $23.25 Mega Glalie EX - 015/059 #15Double Rare $14.30 Mega Glalie EX - 061/059 #61Super Rare $80.00 Mega Glalie EX - 061/059 #61Super Rare $80.00 M Glalie EX (Full Art) #156Ultra Rare $23.25 Glalie EX (Full Art) #155Ultra Rare $14.55 Mega Glalie EX - 015/059 #15Double Rare $14.30 M Glalie EX #35Ultra Rare $8.48 Glalie EX - 014/059 #14Double Rare $2.06 Glalie EX #34Ultra Rare $1.97 Glalie #18Uncommon $1.45 Glalie #30Uncommon $1.28 Glalie #13Rare $1.23

This is an easy feat, though, as most of the best XYZ monsters are Numbers cards anyway