I have about 15 legend monster in my storage but i have little to no space left. Should i sell my normal habitats with lvl 20 monsters in it?

@ngy-eric said in Should i sell my common to elite monster to make room for legend and mithic monster habitat:

I have about 15 legend monster in my storage but i have little to no space left. Should i sell my normal habitats with lvl 20 monsters in it?

Do battles or quests to gain experience and have storage keys.