X2 what Dr. Del said. At some point, we have to take responsibility for our own decisions as a buyer. If the seller is up front with you and answers you questions, it ultimately up to you to accept the risk of the purchase or not.

I've purchased something like this before but it was also from someone that I've purchased from in the past. There is some additional work that may is needed for hatchlings that you purchase prior to their first shed or meal but if that information is provided to you up front, and you're confident in your own ability to get them eating, then go for it.

Why does this make the seller irresponsible for selling them this way? You, as the buyer should be aware of your own abilities and whether or not you are willing to accept the risk of getting the snake eating or not. The prices is low for a reason, if they get the snake started, the price may double.