| Hi Col,
Darwins are one of the easiest pythons to breed. They are no different to breeding coastal carpets. They are the absolute most basic morph to keep in Australia. GTP's and Albino olives are hard to breed consistantly, hence the reason why the prices are where they are.
If you wanted to breed one of the more desireable morphs the white darwins are the way to go .
A realistic price for a pair of albino darwins would be around the 9 - 10 K mark this season, and 100% hets around 2 K per pair.
Gtps have been around the longest of the three but still fetch approx 9 - 10 K per pair.
And last of all the albino olives, these are proving the hardest to breed and no one is having cosistant success with them. Fair dollars for these would be around 18 - 20 K per pair, and around 5-7 k for a pair of 100% hets.
Hope this helps,
Nick | 
