Generally Woma's are priced at around 200-300.
Expect to pay more for a specific locale (as opposed to a 'mixed' one).
For the most part, you'd be looking at a 5-6 foot animal (with the exception of the De Greys which reportedly only grow to a metre).
Colours can be a bit everywhere. Really does depend on what the breeder is going for. You can find a highly patterned dark animal, and an almost patternless from the same locale if you look hard enough.
My RHD is a sweetheart. Just turned a year old sometime with month, and already almost 4 foot, so I've got big expectations from this little gal in terms of size.
Very placid animal once she realises it's not feeding time, but when it is feeding time, anything that moves within the vicitnity of her cage is fair game.
Big characters- lots of fun, and fantastic eaters. Mine hasn't ever missed a feed (and is more than willing to eat extra when my other snake isn't hungry).
If you're not all that fussy on a specific locale, look around and see what catchers your eye. I've said it before and I'll say it again: no such thing as an ugly snake!