While two points of damage might not do much, the life gain and card advantage certainly do
As an example, if your pokemon has the poison effect, they will take 10 damage not only during your turn, but also your opponent's turn so you would want to cure your status effects as quickly as possible
25 The Masked Royal Prize Promo: $18,000 This is undoubtedly one of the most recent rare cards, featuring the Masked Royal character from Pokemon Sun & Moon and released as recently as 2017
The passive alone is useful, and it also allows you to get a second use out of a creature, whether because it has a good enters effect, or because it hits hard
It will go for hundreds of dollars, potentially thousands if the card ends up being good, and its the one thing you really want to open in the set