If you are truly interested in this trade, I would ask this person for more info on these "hets". Ask them where they got these hets from, if they produced them ask to see proof that these are actual hets. Number one rule is to do your home work on the person you are looking to do a trade with! A het's genetics are only good as the seller. I'd also get a written guarantee on these snakes. This is just me speaking because I've been burned twice now on "hets", when really I was sold two normals. I now go over and beyond most people when it comes to needing proof and searching around before giving money or any kind of trade to someone else.