I haven't priced them recently, but depending on quality, I would guess anywhere between $500 and $1000. Someone else might chime in here though. A firefly is a Fire + Pastel. A good quality pastel female will go for $150-250. A good quality fire female will go for $200-350. That's kind of where I'm basing my 500-1k estimate...
So, now I'm a bit confused. If what I'm looking at is just a plain pastel, it is way overpriced, but if it is a firefly, the asking price is reasonable. Is that right? If so, how can I figure out which it is?