Not to be a downer, but she definitely doesn't look like a full CT. Looks like a VT x CT cross. But, if you breed her to a full CT, you should still get mostly CT. I still think she's worth it though, because that marbling is awesome!!
$30 shipping isn't too bad either. It costs $19 for the actual shipping, heat packs are around $2 each, styrofoam can be expensive... plus the time it takes to actually pack fish and bring them to the post office is worth something... so as long as the packing job is good, I don't think there's a problem with charging $30 shipping.