Carmen is a high-investment card
Prices are primarily driven by the Full Art and Secret Rare variants , which were produced in lower quantities and are increasingly difficult to find in top condition
My concern comes into play when people begin to look at their decks and say "what minimal changes can I make to start with an additional card," as I did with our deck last week, because I feel like that's outside of the spirit of companions
Short answer: Yes, Japan Showcase cards are valuable, especially fracture foils
The first time you crew it each time, you can draw two cards if it was double crewed and you smash face, I really like in in Zombie token decks since they have loads of spare 2/2 tokens running around to double crew it
These go on the Stack at the same time, and you can choose what order they go in - but each effect is identical, so it really doesn't matter