The motley pattern gene does exist in creamsicle lines, so certainly possible that you produced motleys from cream parents. As Joe says, they are motley if the belly is free of any checkers, but I guess in my opinion motley creams are something special!! I am not sure that you would be able to charge more for them in your area. Here creamsicles go for quite a bit more than amels and motley creams would be about double the creamsicle price - but markets differ.
In my opinion, if you like them - hang onto them!! The motley pattern in the pure orange tones of a nice creamsicle is a spectacular snake when mature - at least I think so. Would be great to see pics if you have any,
mary v.