I wouldn't pay a dime for a repro of a commercially released game. You're basically paying for a bootleg. *shrugs*
I would (and have) if it's something that's been translated into (and never saw a release in) a language I can understand.
Same. I bought a repro/translation of Dragon Quest Monsters: Caravan Heart. And it was worth it to be able to play the game w/o and need for a translation guide. I was also tempted to buy a repro of Kid Dracula on NES, but decided against it after I found out the guy was using foxhack's translation patch in his carts.
I doubt I'd ever buy a repro of a commercially available game from my own region though.