I am wondering how much I should sell Poison Virgo and Flame Serpent? How much is their value? What should I sell each of them for and are they rare?

Here are the pictures https://imgur.com/a/522yBSw

Hey LightFurySmash
You can sell Poison Virgo for 15£. And Flame Serpent 20£ but if you have the gold flame serpent I think you can sell it for 25£.