I don't get why he is not honoring his terms. Just from looking at your side of story it seems unreasonable for you to pay the extra 250 and others feel the same. With the views this thread has....seems over 250 he is going to turn off some potential buyers. It just seems so odd a big name breeder would do that.
also he is getting you another at a show? From who? If I'm getting a snake I want to know from who.