whether or not its a good trade is dependant on many things. What are you looking for ? Why is someone wanting to trade that animal for yours? I would get a good look at this blood before trading. Bloods are individuals(as most animals are) I have some blood pythons that are a pleasure to hold and I have some that are complete terrors. That size cage is fine for a blood. Bloods are very lazy and for the most part don't move much. they are ambush hunters--not like the Bci which sometimes actively hunts. I personally love bloods they are some of the most fascinating snakes I have owned. hope this helps you