The price is whatever someone is willing to pay for it
Due to this, you may have to tone down your ambitions slightly, but theres still plenty of potential for shenanigans
It may not have seen much competitive use when it was released, but at least it looks good
Many Mew lists are cutting a few Stadium cards from their lists (or in some cases all Stadiums altogether), meaning sometimes your first Path to the Peak might stick for the whole game
Its the same as the rules for turning a Morph or Disguise creature face-up: any effects which trigger from unlocking the door WILL use the stack and allow opponents to respond as normal, so this ends up sounding scarier than it is in practice
In addition, Articuno, (the non-EX version) is a particularly brutal basic Pokemon capable of being used as a wall while you set up Greninja