As you probably know, most mana rocks are pretty cheap on the secondary market like the heavily reprinted Sol Ring here for 1.99 and the heavily played and reprinted too Arcane Signet
Artificer's Intuition, a blue MTG card that was printed just once, twenty years ago, has suddenly jumped up in price, rising from $4.10 on Friday to $11.30 today, according to the market tracker at MTG Goldfish
It can be a pretty big upset if your opponent kills Brutal Cathar when it has several creatures under it
Behemoth Sledge is an option in Selesyna, too
Many commanders in MTG can fully station these lands on the turn they come in, and there are lots of ways to double creature power these days, so dont write these off as clunky
Functionally, an SAR is playable exactly like the regular ex or VSTAR it duplicates