I'm guessing your not going to get a snake in good condition if they've been keeping it in a pillow case for 2 weeks. It's most likely going to be sick and dehydrated, because I highly doubt it's had proper heat or any water while in the pillow case.
Unless your are looking for a rescue I would probably start looking else where already. It's a sad fact of life that you can't save them all so don't take on more than you are ready for. A sick snake can end up costing you more than a healthy one from a breeder would.