Treasures are permanents, so this can easily get pretty gross quickly, and it will also trigger off all kinds of other flow-through permanents
Being tied to toughness is uncharacteristic of a red card so you probably have better results pairing this with something like Wall of Stone or Wall of Omens
Surveil is better than scry as you can fill up your graveyard with those goodies, which a lot of cards in Esper colors care about in all permanent types, from White and Blue loving artifact recursion and White and Black creature recursion and abilities like jump-start and flashback in these colors
The same is true of the delve mechanic and the Phyrexian mana mechanic, and while neither of these mechanics ended up needing to be banned while in Standard, both are right on the border, and one slight miss could lead to major problems and bannable cards
Condition, grading scores, and historical scarcity dictate these market values, turning tiny pieces of cardboard into serious financial assets