Any card with an acorn-shaped holo stamp at the bottom is, functionally, a silver-bordered one
Like most Pokmon cards, the value of Flutter Mane depends on a few consistent factors: its rarity, the printing and finish (regular or foil), its physical condition, and the set it was printed in (Scarlet & Violet Black Star Promos)
Edea Kramer Teferi, Mage of Zhalfir is a sweet card that can safely eat 3/3s, since it turns off your opponents removal/combat trick window
Some might argue that Urzas Saga should be on the list, and while it can be a nice way to grab Colossus Hammer, Sol Ring or the aforementioned Masterwork of Ingenuity, its also a lot pricier than The Mycosynth Gardens
Finally, Wanted Griffin may be better than Senate Griffin at 4, again depending on what your game plan ends up being