I have no idea. I could make either kit fit into probably the same size box. An average size box, say for moving or fruit from the grocery store. If it sells for the buy now option (or more) I'll still give you free shipping. Otherwise we could split it. Shipping usually ends up biting me in the ass though. I expect it to be like $10-$20 and it ends up being closer to what I sold it for...
Sometimes it makes me think I'm doing it wrong.