The main reason that burms are cheaper is basically supply and demand. Burms lay alot more eggs than some other pythons like bps. Two albino burms bred to one another can yeild up to 70 albino babies. That is alot different than the average bp clutch of 6-8 eggs. Retic can also yeild 70+ eggs but albino retics have only been bred since the early 90s. Albino burms have been bred since the early 80s. So there has been alot of time for the price of albino burms to drop and a large supply to become available when compared to other albinos. There was once a time when they were just as expensive as others.