I don't know how they are priced but I've seen them sold for a pretty penny! I would do some research on them before you put them up for sale they are some beautiful pieces.
That is some nice pet wood. It is pretty fractured however. (as most is) The copper mineral is probably worth a few bucks. The wood depends on how bad someone wants it. The rest is a crap shoot. I think I would start each at 5 bucks and hope for the best.