Not sure what number we're at but it should have been in the top ten anyway.
Burms, Retics, Rocks do not make a good first snake. They some of the largest sankes on the planet and will need very large enclosures that will cost very large amounts of money to build. The will also need a ton of food including pigs some day.
So please don't get one with the intention of selling it for twice what you paid for it when it gets too big.