I just recently purchased some corns for the same reasons you mentioned.

One thing corn people don't tell you up front is that baby colubrids will regurge (puke up their food) for a variety of reasons including food too large, going in to shed, temps too cold or too hot, stress, etc.

It's gross to look at but you will not need to see the mess to know it happened. Your nose will quickly let you know.

It happens so often that they have a regurge protocol to follow because the younger snakes can die if they do it more than once or twice.

Spend a few extra dollars and buy an older corn and stay away from any that are less than 10 grams.