4350g is a huge female... Most of them only get up to around 2000g. There are lots of exceptions to that though. Someone posted a video recently and one of the snakes in it was a 5500g female!

If I were you, I'd spend the extra and get a female. That way, if you decide to breed in say, a year or two, you can pick up a male and they'll both be up to size at the same time. But yeah, probably $300-350 is what you'll pay. I've seen people selling 2-3 year old female pastels for $600 -_- Stupid Canadian ball python market....